Answer:
It's a bit unclear with the table this way, but I count fifteen points, fifteen lines of the table, each a pair of numbers.
That's 15 degrees of freedom in the data. When modeling, each parameter in the model uses up one degree of freedom, so you'd use a smaller number of degrees of freedom when calculating t statistics, etc.
A change drawer contains $7.50 made up entirely of quarters, nickels, and dimes. There are twice as many nickels as dimes, and the number of dimes and quarters sum to 34. Determine the number of nickels, dimes, and quarters in the drawer.
Answer:
The drawer contains 40 nickels, 20 dimes and 14 quarters.
Step-by-step explanation:
Let d, q and n represent number of dimes, quarters and nickels respectively.
We have been given that there are twice as many nickels as dimes.
[tex]n=2d...(1)[/tex]
Further, the number of dimes and quarters sum to 34.
[tex]d+q=34...(2)[/tex]
As the change drawer contains $7.50 made up entirely of quarters, nickels, and dimes.
[tex]0.10d+0.25q+0.05n=7.50...(3)[/tex]
From equation (2), we will get:
[tex]q=34-d[/tex]
Substituting equation (1) and equation (2) in equation (3), we will get:
[tex]0.10d+0.25(34-d)+0.05(2d)=7.50[/tex]
[tex]0.10d+8.50-0.25d+0.10d=7.50[/tex]
[tex]-0.05d+8.50=7.50[/tex]
[tex]-0.05d+8.50-8.50=7.50-8.50[/tex]
[tex]-0.05d=-1[/tex]
[tex]\frac{-0.05d}{-0.05}=\frac{-1}{-0.05}[/tex]
[tex]d=20[/tex]
Therefore, drawer contains 20 dimes.
Substitute [tex]d=20[/tex] in equation (1):
[tex]n=2d[/tex]
[tex]n=2(20)[/tex]
[tex]n=40[/tex]
Therefore, drawer contains 40 nickels.
Substitute [tex]d=20[/tex] in equation (2):
[tex]20+q=34[/tex]
[tex]20-20+q=34-20[/tex]
[tex]q=14[/tex]
Therefore, drawer contains 14 quarters.
Answer:
There are 40 nickels, 14 quarters and 20 dimes.
Step-by-step explanation:
A change drawer contains $7.50
Let the number of quarters in the drawer = q
let the number of nickels in the drawer = n
and number of dimes = d
So, (0.25q + 0.05n + 0.10d) = 7.5
By dividing the equation by 0.50
5q + n + 2d = 150 ---------(1)
Now statement says " There are twice as nickels as dimes"
n = 2d -------(2)
And "the number of dimes and quarters sum to 34"
d + q = 34 -------(3)
We replace n = 2d from equation (2) in equation (1)
5q + 2d + 2d = 150
5q + 4d = 150 ---------(4)
Multiply equation (3) by 4 and subtract it from equation (4)
(5q + 4d) - 4(d + q) = 150 - 34×4
5q - 4q + 4d - 4d = 150 - 136
q = 14
We plug in the value of q in equation (3)
d + 14 = 34
d = 34 - 14
d = 20
Since n = 2d
So n = 2×20
n = 40
Therefore, there are 40 nickels, 14 quarters and 20 dimes.
Malia has her $ 10.00 allowence to spend at the fall carnival. She decides to order two ice cream cones for herself and her sister. What is the resulting change in Malia's allowence?
Answer:
Step-by-step explanation:
Answer:
Malia's allowance changed from $10.00 to $([tex]10-2x[/tex]) after buying ice cream cones.
Step-by-step explanation:
We are given the following information:
Malia's allowance to spend at carnival = $10.00
Ice cream ordered by her = 2
Let x dollars be the cost of one ice cream cone.
Total money spent on ice creams = [tex]2x[/tex]
Formula:
[tex]\text{Change in Malia's allowance} = \text{Total allowance} - \text{Money spent on ice cream cones}\\= 10 - 2x[/tex]
Thus, Malia's allowance changed from $10.00 to $([tex]10-2x[/tex]) after buying ice cream cones.
At the beginning of the day the stock market goes up 30 1/2 points.At the end of the day the stock market goes down 120 1/4 points.What is the total change in the stock market from the beginning of the day to the end of the day
Answer:
The total change in the stock market from the beginning of the day to the end of the day is [tex]-89\frac{3}{4}[/tex] or the stock market goes down [tex]89\frac{3}{4}[/tex]
Step-by-step explanation:
At the beginning of the day the stock market goes up [tex]30\frac{1}{2}[/tex] points. This means, we have to add [tex]30\frac{1}{2}[/tex]
At the end of the day the stock market goes down [tex]120\frac{1}{4}[/tex] points. This means, we have to subtract [tex]120\frac{1}{4}[/tex]
Change [tex]=+30\frac{1}{2}-120\frac{1}{4}=(30-120)+\left(\frac{1}{2}-\frac{1}{4}\right)=-90+\frac{1}{4}=-89\frac{3}{4}[/tex]
So, the total change in the stock market from the beginning of the day to the end of the day is [tex]-89\frac{3}{4}[/tex] or the stock market goes down [tex]89\frac{3}{4}[/tex]
Answer 89 3/4
I dont know what to do help me
Simon is factoring the polynomial. x2−4x−12 (x−6)(x+______) What value should Simon write on the line? −6 −2 2 6
Answer:
2
Step-by-step explanation:
You have to find a number that added with -6 equals -4, and multiplied equals -12.
Just have to do the opperations and that is all!
[tex](x-6)(x+2)=x^2+2x-6x-12=x^2-4x-12[/tex]
Hope you like it!
Answer:
Option C is the answer.
Step-by-step explanation:
Simon is factorizing the polynomial x² - 4x - 12 = (x - 6)( x + ......)
We will factorize the left hand side of the given expression
x² - 4x - 12
= x² - 6x + 2x - 12
Now we will break 12 into the factors so that sum of the factors should equal to 4
{ 6 × 2 = 12 and 6 - 2 = 4]
= x(x - 6) + 2(x - 6)
= (x + 2)(x - 6)
Therefore, the blank space should be replaced by 2.
Option C is the answer.
Evaluate the function g(x) = –2x2 + 3x – 5 for the input values –2, 0, and 3. G(–2) = –2(–2)2 + 3(–2) – 5 g(–2) = –2(4) – 6 – 5 g(–2) = g(0) = g(3) =
Answer:
Step-by-step explanation:
g(x)= -2 x^2 + 3 x - 5
g(-2) = -2 . (-2)^2 + 3. (-2) - 5 = -2 . 4 - 6 - 5 = - 8 - 6 - 5 = - 19
g(0) = -2 . (0)^2 + 3 . 0 - 5 = -2 . 0 + 0 - 5 = 0 + 0 - 5 = - 5
g(3) = -2 . (3)^2 + 3 . (3) - 5 = -2 . 9 + 9 - 5 = -18 + 9 - 5 = - 14
The value of g(x) is the input values are –2, 0, and 3 are -19, -5 and -14
Functions and valuesGiven the following function
g(x) = –2x² + 3x – 5
For the input value of -2
g(-2) = –2(-2)² + 3(-2) – 5
g(-2) = -8 - 6 - 5
g(-2) =-19
If the value of x is 0
g(0) = –2(0)² + 3(0)– 5
g(0) = -5
If the vaue of x is 3
g(3) = –2x² + 3x – 5
g(3) = -2(3)² + 3(3)– 5
g(3) =-18 + 9 - 5
g(3) = -14
Hence the value of g(x) is the input values are –2, 0, and 3 are -19, -5 and -14
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Vector C has a magnitude of 22.2 m and points in the −y‑ direction. Vectors A and B both have positive y‑ components, and make angles of α=41.9° and β=28.2° with the positive and negative x- axis, respectively. If the vector sum A+B+C=0 , what are the magnitudes of A and B?
Answer:
The magnitude of A is 17.46 m and B is 1.50 m
Step-by-step explanation:
If the vector sum A+B+C =0, then the sum of the projection of the vector in axes x- is zero and the sum of the projection of the vector in the axes y- is also zero.
Ax+Bx+Cx = 0
Ay+By+Cy = 0
|Ax| = cos 41.9 * |A|
|Ay| = sin 41.9 * |A|
|Bx| = cos 28.2 * |B|
|By| = sin 28.2 * |B|
|Cx| = 0
|Cy| = 22.2
Ax+Bx+Cx = 0
|Ax|-|Bx|+0 =0
the vector Ax is in the positive direction of the x- axes and Bx in the negative direction and C do not have a component in the x- axes
cos 41.9 * |A| - cos 28.2 * |B| = 0 (I)
Ay+By+Cy = 0
|Ay|+|By|-|Cy|=0
the vector Ay and By are the positive direction of the y- axes and Cy in the negative direction
sin 41.9 * |A| + sin 28.2 * |B| - 22 =0 (II)
Now we have a system of 2 (I and II) equations and 2 variables (|A| and |B|)
cos 41.9 * |A| - cos 28.2 * |B| = 0
sin 41.9 * |A| + sin 28.2 * |B| = 22
cos 41.9 * |A| = cos 28.2 * |B|
|A| = cos 28.2 * |B| / cos 41.9
sin 41.9 * |A| + sin 28.2 * |B| = 22
sin 41.9 * cos 28.2 * |B| / cos 41.9 + sin 28.2 * |B| = 22
tg 41.9 * cos 28.2 * |B| + sin 28.2 * |B| = 22
(tg 41.9 * cos 28.2 + sin 28.2) * |B| = 22
|B| = 22 / (tg 41.9 * cos 28.2 + sin 28.2)
|B| = 17.46
|A| = 1.50
The magnitude of vector A and the magnitude of vector B is 20.6198 and 17.4146 respectively.
What is a vector?The quantity which has magnitude, direction and follows the law of vector addition is called a vector.
Given
Vector C has a magnitude of 22.2 m and points in the negative y‑direction.
Vectors A and B both have positive y‑components and make angles of α=41.9° and β=28.2° with the positive and negative x-axis.
Let the vectors A, B, and C be concurrent.
Then vectors can be resolved in x-direction and y-direction.
Vectors in y-direction
[tex]\rm A\ sin 41.9^o + B \ sin28.2^o = C\\0.6678\ A\ \ +\ 0.4726\ B \ = 22[/tex].....eq(1)
Vectors in x-direction
[tex]\rm A \ cos41.9^o = B \ cos 28.2^o\\0.74431 \ \ A = B \ \ 0.8813[/tex].....eq(2)
From equations 1 and 2, we get
A = 20.6199 and B = 17.4147
Thus, the magnitude of vector A and the magnitude of vector B is 20.6198 and 17.4146 respectively.
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Lake Alice is full of alligators and turtles the number of turtles is 16 less than 3 times the number of alligators in the lake there are 200 reptiles total
Answer:
72 alligators, 128 turtles
Step-by-step explanation:
When you put the words into the form of an equation, with a being alligators, you get
3a-16=200
So you have to do 'letters left numbers right'. This gives you
3a=216
Now you have to divide. 216 divided by 3 equals 72. So there are 72 alligators. 200 minus 72 equals 128, so there are 128 turtles
Answer:
The number of alligators and number of turtles are 54 and 146 respectively.
Step-by-step explanation:
Given :
The number of turtles is 16 less than 3 times the number of alligators in the lake
There are 200 reptiles total.
To Find : Find the numbers of alligators and turtles .
Solution:
Let the number of alligators be x
So, The number of turtles is 16 less than 3 times the number of alligators
Number of turtles = 3x-16
Now we are given that there are 200 reptiles in total .
[tex]x+3x-16=200[/tex]
[tex]4x-16=200[/tex]
[tex]4x=216[/tex]
[tex]x=54[/tex]
Number of alligators = 54
Number of turtles = 3(54)-16 = 146
Hence the number of alligators and number of turtles are 54 and 146 respectively .
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The temperature dropped from 75 degrees to 50 degrees. What was the percent decrease in the temperature? 33% 50% 66%
Answer: 33%
Step-by-step explanation:
Given : The temperature dropped from 75 degrees to 50 degrees.
Decrease in temperature ( in degrees) = 75-50=25
The formula to find the percent decrease :-
[tex]\dfrac{\text{Decrease in temperature}}{\text{Initial temperature}}\times100\\\\=\dfrac{25}{75}\times100\\\\=33.3333333333\approx33\%\ \ \text{[Rounded to the nearest whole percent.]}[/tex]
Hence, the percent decrease in the temperature = 33%
The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 18. If there are n = 4 scores in each sample, what is the estimated standard error for the sample mean difference?
Answer: 3
Step-by-step explanation:
Given : Pooled variance : [tex]\sigma^2=18[/tex]
Sample sizes of each sample = [tex]n_1=n_2=4[/tex]
We know that the standard error for the sample mean difference is given by :-
[tex]S.E.=\sqrt{\sigma^2(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\\\=\sqrt{(18)(\dfrac{1}{4}+\dfrac{1}{4})}\\\\=\sqrt{(18)(\dfrac{1}{2})}=\sqrt{9}=3[/tex]
Hence, the estimated standard error for the sample mean difference =3
Please help with this!
Answer:
y = 8RS = 51ST = 29Step-by-step explanation:
(a) You use the fact that the lengths RS and ST total the length RT.
RS +ST = RT
(6y+3) +(3y+5) = 80 . . . . . substitute the given values
9y +8 = 80 . . . . . . . . . . . . .simplify
9y = 72 . . . . . . . . . . . . . . . .subtract 8
72/9 = y = 8 . . . . . . . . . . . .divide by the coefficient of y
___
(b) Now, the value of y can be substituted into the expressions for RS and ST to find their lengths.
RS = 6y +3 = 6·8 +3
RS = 51
ST = 3y +5 = 3·8 +5
ST = 29
___
Check
RS +ST = 51 +29 = 80 = RT . . . . the numbers check OK
The equation R= 10A - 20 represents the revenue R ( in dollars) you make spending A dollars on advertising. Your revenue totaled $110. How much did u spend on advertising?
Answer:
$13
Step-by-step explanation:
Fill in the given values and solve for the unknown.
110 = 10A -20
130 = 10A . . . . . add 20
13 = A . . . . . . . . divide by 10
You spent $13 on advertising.
Solve for x: 2 over 3 equals the quantity x minus 1 end quantity over 5
Step-by-step explanation:
seriously i am not understanding your question
A = D Based on the given information, choose the similarity statement that you would use to say ABC~DEF. If you could NOT conclude the triangles similar, then choose NOT. AA SAS SSS NOT
Answer:
SAS (side angle side)
Step-by-step explanation:
We have a pair of corresponding sides and the included angle. The angle is equal, but the sides are a fraction of the other triangle's side and has an equal rate.
2AC=DF
2AB=DE
The triangles are congruent
Answer:
SAS
Step-by-step explanation:
The Island of Knights and Knaves has two types of inhabitants: Knights, who always tell the truth, and Knaves, who always lie. As you are exploring the Island of Knights and Knaves you encounter two people named A and B. A tells you "I am a Knave, but B isn’t". B says nothing. Determine the nature of A and B, if you can.
Answer: First, suppose that A is a knight. then when he says "i am a knave" he would be lying, so you have a logical failure because knights can't lie.
if A is a knave and says "I am a Knave, but B isn’t" then he would be telling a truth in the first part.
now you have two paths to tink itm as A said a truth, he can't be a knave. but if you consider the whole sentence can be splitted in two sentences.
I am a Knave ----- wealready know that will be a truth.
but B isn’t----- and now, as the first sentence is true, this must be false, so the sum of both sentences is false.
so A is a knave and B is a knave.
Final answer:
After analyzing the statements provided by A and the silence of B, the logical deduction reveals that both A and B are Knights, given the inherent contradictions in A's statement if he or B were Knaves.
Explanation:
The Island of Knights and Knaves presents a classic example of logical deduction. Given that A states he is a Knave but also says 'B isn’t a Knave', we can infer A's nature through contradiction. If A were a Knave, he would not tell the truth about himself or B, creating a paradox since a Knave can't tell the truth. If A is a Knight, his statement is also impossible since Knights cannot lie. Therefore, A must be a Knight, making the first part of his statement a lie (which is not possible for a Knight), but the second part true: B is not a Knave. Consequently, for the statement to uphold the rules of the island, B must be a Knight as well, which is consistent with the silent B offering no statements that could be lies.
Find the average rate of change.
p(x) = 6x + 7 on [2, 2 + h] , h ≠ 0
The average rate of change of a function is found with the formula (f(b) - f(a)) / (b - a). When applying this formula to the function p(x) = 6x + 7 over the interval [2, 2 + h], we find that the average rate of change is 6.
Explanation:In Mathematics, the average rate of change of a function on the interval [a, b] is given by the formula (f(b) - f(a)) / (b - a). In this case, our function is p(x) = 6x + 7, and the interval is [2, 2 + h]. So, we can plug these values into the formula to get an expression for the average rate of change.
First, calculate p(2 + h) and p(2). Here they are:
p(2 + h) = 6 × (2 + h) + 7 = 12 + 6h + 7 = 19 + 6hp(2) = 6 × 2 + 7 = 12 + 7 = 19Substitute these expressions into the average rate of change formula:
(P(2 + h) - P(2)) / (2 + h - 2) = (19 + 6h - 19) / (h) = 6h / h = 6.
So, the average rate of change of the function p(x) = 6x + 7 on the interval [2, 2 + h] is 6.
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What is the value of 3ab+ 5b -6 when a=-1 and b=3
Answer:
Hello my friend! The answer is ZERO!
Step-by-step explanation:
If we substitue the values of "a" and "b" on the equation, will have:
3*(a*b) + 5(b) -6 =
3 * (-1 * 3) + 5*(3) - 6 =
-9 + 15 - 6 = 0
Given: △ABC, m∠C=90° m∠ABC=30°, AL ∠ bisector LB=18m. Find: CL
SOMEONE PLZ ANSWER FAST IM BEGGING UUUUU
Answer:
9 m
Step-by-step explanation:
∠CAB = 90° -∠ABC = 90° -30° = 60°
Since AL bisects angle A, we have ...
∠LAC = ∠LAB = 60°/2 = 30°
Then ∠BAL = ∠ABL = 30° and ΔABL is isosceles with AL = LB = 18 m.
The 30°-60°-90° triangle ALC has sides in the ratio ...
CL : CA : AL = 1 : √3 : 2
so
CL/AL = 1/2
CL = AL/2 = (18 m)/2 = 9 m
_____
It can help to draw a diagram
In triangle BCL, since it is a 30-60-90 triangle, the side opposite the 60-degree angle is √3 times the side opposite the 30-degree angle. Thus, the length of side CL is 18√3 meters.
In triangle ABC, you're told that angle C is 90 degrees and the angle ABC is 30 degrees. Therefore angle ACB (or BAC) is 60 degrees because the sum of all angles in a triangle is 180 degrees.
You're also given that LB, a line that bisects angle B, is 18 meters. The triangle BCL is a 30-60-90 triangle, a special type of triangle where the sides are in the ratio 1:√3:2.
In this case, LC (the side opposite the 60-degree angle) is √3 times the side opposite the 30-degree angle (LB), which is 18 meters. So, the length of CL = 18√3 meters.
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Construction of the Tower of Pisa was completed in 1360. By 1990, the tilt of the tower was so severe that it was closed for renovation. Renovators were able to reduce the tower's 1990 tilt by 17 inches. The resultant tower leans 13.5 feet (162 inches) off the perpendicular. When the tower was reopened in 2001, officials forecast that it would take 300 years for the tower to return to its 1990 tilt.
(a) Construct a linear formula that models the lean of the renovated tower, where l is the number of inches from the perpendicular and t is the number of years since 2001.
The formula is: 162+(17/300)t
Use the formula from part (a) to predict the lean of the tower in 2150. (Round your answer to two decimal places.
Answer:
(a) The linear formula that models the lean of the renovated tower is:
I = (17 / 300)t + 162
In 2150, the tower will lean 170.44 inches off the perpendicular.
Step-by-step explanation:
Data:
Renovators were able to reduce the tower's 1990 tilt by 17 inches.The resultant tower leans 162 inches off the perpendicular.In 2001, officials forecast that it would take 300 years for the tower to return to its 1990 tilt.(a)
A linear formula has the form:
y = mx + bwhere
y is the dependent variablex is the independent variablem is the slope, andb is the y-axis interceptionIn this case, the dependent variable is the tilt of the tower, measured as the number of inches from the perpendicular. Let´s call "I" this variable. And what does it depend on? It depends on the variable time. The tilt of the tower varies over time.
Therefore, the time (in years) is the independent variable. Let´s call "t" this variable.
The slope (m) is the change in the dependent variable for each unit of the independent variable. So, it is the change in the number of inches from the perpendicular, for each year elapsed.
Officials forecast that it would take 300 years for the tower to return to its 1990 tilt. In other words, 300 years to the tower to lean 17 inches. Or, the tower will lean 17 inches in 300 years. That is the slope (m).
m = (17 / 300) inches per year
The y-axis interception (b) is the value of the dependent variable (I) when the independent variable (t) is equal to zero.
Our t=0 occurs when the tower was reopened, in 2001.
At that time, the tower leaned 162 inches off the perpendicular.
b = 162
Then, the linear formula that models the lean of the renovated tower is:
I = (17 / 300)t + 162
or
I = 162 + (17 / 300)t
To predict the lean of the tower in 2150, let´s substitute the independent variable t in the formula for the time elapsed from 2001 (our t=0) to 2150.
Time elapsed = 2150 - 2001 = 149 years
I = 162 + (17 / 300) * 149
I = 170.44
In 2150, the tower will lean 170.44 inches off the perpendicular.
Final answer:
To predict the lean of the Tower of Pisa in 2150, plug 149 years into the formula l = 162 + (17/300)t, resulting in approximately 170.45 inches lean from the perpendicular.
Explanation:
The question involves constructing a linear model and making a prediction based on that model. Given the information, the linear formula to model the lean of the renovated Tower of Pisa is [tex]\l = 162 + (17/300)t[/tex], where l represents the lean of the tower inches away from the perpendicular, and t represents the number of years since 2001.
To predict the lean of the tower in 2150 using the formula, we need to first calculate the number of years from 2001 until 2150, which is 2150 - 2001 = 149 years. Plugging this value into the formula, we get:
[tex]\[ l = 162 + (17/300) \times 149 \][/tex]
Now, let's calculate the result:
[tex]\[ l = 162 + 0.0567 \times 149 \][/tex]
[tex]\[ l = 162 + 8.4483 \][/tex]
[tex]\[ l = 170.4483 \][/tex]
Therefore, rounding to two decimal places, the predicted lean of the tower in 2150 would be approximately 170.45 inches off the perpendicular.
If ΔEFG ~ ΔLMN with a ratio of 2:1, which of the following is true?
segment EF over segment LM equals segment FG over segment MN
segment EF is congruent to segment LM
segment EF over segment LM equals segment EG over segment LM
segment EG is congruent to segment LM
Answer:
segment EF over segment LM equals segment FG over segment MN
Step-by-step explanation:
The triangles are similar, not congruent, so any answer choice with the word "congruent" can be ignored.
The sequence of letters in the triangle name tells you the corresponding segments:
EF corresponds to LMEG corresponds to LNFG corresponds to MNCorresponding segments have the same ratio, so ...
EF/LM = FG/MN . . . . . . matches the first answer choice
EF/LM = EG/LN . . . . does not match the 3rd answer choice
Answer:
segment EF over segment LM equals segment FG over segment MN
The tallest living man at one time had a height of 230 cm. The shortest living man at that time had a height of 91.3 cm. Heights of men at that time had a mean of 170.53 cm and a standard deviation of 5.91 cm. Which of these two men had the height that was more extreme?
Answer: The shortest living man at that time had the height that was more extreme.
Step-by-step explanation:
We will z scores to solve this exercise. The formula we need is:
[tex]z=\frac{x-\mu}{\sigma}[/tex]
Where [tex]x[/tex] is the raw score, [tex]\mu[/tex] is the mean and [tex]\sigma[/tex] is the standard deviation.
We know at that time heights of men had a mean of 170.53 centimeters and a standard deviation of 5.91 centimeters, then:
[tex]\u=170.53\\\\\sigma=5.91[/tex]
Knowing that the tallest living man at that time had a height of 230 centimeters, we get:
[tex]z=\frac{230-170.53}{5.91}\approx10.07[/tex]
And knowing that the shortest living man at that time had a height of 91.3 centimeters, we get:
[tex]z=\frac{91.3-170.53}{5.91}\approx-13.40[/tex]
Based on this, we can conclude that the shortest living man at that time had the height that was more extreme.
Write an equation of a line that is parallel to x=3 and passes through (-4,3)
Check the picture below.
-100,-200,0,-25,30 in order from least to greatest
-200,-100,-25,0,30
Step-by-step explanation:
negatives will always be less than positives with negatives you put greatest to least and then 0 and then positives from least to greatest
In order to get the answer you have to remember that bigger negatives are actually less then smaller negatives so -200 would be less then -25.
[tex]-100, -200, 0, -25, 30[/tex]
[tex]-200 < -100[/tex]
[tex]-100 <-25[/tex]
[tex]-25 < 0[/tex]
[tex]0 <30[/tex]
[tex]= -200,-100,-25,0,30[/tex]
Therefore your answer is "-200,-100,-25,0,30."
Hope this helps.
Please help with the first question....
Answer:
A) The functions are not inverses of each other.
Step-by-step explanation:
[tex]f(g(x))=\sqrt{(x^2+3)-3}=\sqrt{x^2}=|x|\ne x[/tex]
The result of f(g(x)) is not always x, so the functions are not inverses of each other.
In general, a quadratic (or any even-degree polynomial) such as g(x) cannot have an inverse function because it does not pass the horizontal line test.
What are the terms in the expression, 3 + 5 + 7b – 18a?
a)The terms are 3 + 5 and 7b – 18a.
b) The terms are 3, 5, 7b, and -18a.
c)The terms are 3, 5, 7b and 18a.
Final answer:
The terms in the expression 3 + 5 + 7b – 18a are the individual elements consisting of constants and variables with their coefficients: 3, 5, 7b, and -18a, with the correct response being option b.
Explanation:
The terms in the expression 3 + 5 + 7b – 18a are individual elements that are added or subtracted within the expression. These are individually known as terms. In an algebraic expression, coefficients and variables combined as a product (like 7b or -18a) are considered single terms. On the other hand, numbers without variables, such as 3 and 5, are also terms but are called constants because their values do not change. Consequently, each number or variable or product of a number and a variable that is separated by a plus or a minus sign is a separate term.
In this expression, we have four distinct terms which are 3, 5, 7b, and -18a. The correct answer is thus option b: The terms are 3, 5, 7b, and -18a.
In 1995, the standard bus fare in Chicago was $1.50. In 2008, the standard bus fare was $2.25. Give your answer as a percentage value. Find the percent increase of the bus fare in Chicago.
Answer:
The bus fair is 50% increases.
Step-by-step explanation:
The percentage is the proportion of the relation to the whole.
Percentage increase is calculate as ratio of difference of original and new value to the original value. i.e.
[tex]\frac{ Percentage\ increase\ \ =\ \ new\ value - original \ value}{original\ \ value}[/tex]
∴ [tex]\frac{ Percentage\ increase\ \ =\ \ 2.25 - 1.50 }{1.50}[/tex]
⇒ Percentage increase = 50%
By using percentage, the result obtained is-
Percentage increase in bus fare in Chicago = 50%
What is percentage?
Suppose there is a number and the number has to be expressed as a fraction of 100. The fraction is called percentage.
For example 2% means [tex]\frac{2}{100}[/tex]. Here 2 is expressed as a fraction of 100.
Here,
Bus fare in the year 1995 in Chicago= $1.50
Bus fare in the year 2008 in Chicago = $2.25
Increase in bus fare = $(2.25 - 1.50) = $0.75
Percentage increase in bus fare in Chicago = [tex]\frac{0.75}{1.50}\times 100[/tex]
= 50%
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PLEASE HELP!!!
Solve the system of equations using the substitution method.
x=3+1/2y
−2x−y=3
Enter your answer, as decimals, in the boxes.
( , )
Answer:
x = 3+1/2 y -----Equation-1
-2x-y = 2 -------Equation-1
Multiplying equation 1 by 2 we get
2x = 2*(3+1/2y)
2x = 6+y
y = 2x-6
substituting the value of of y in equation2
-2x - (2x-6) = 2
-2x -2x +6 = 2
-4x = 2-6
-4x = -4
x = -4/-4 = 1
y = 2x-6 = 2-6 = -4
x = 1
y = -4
Step-by-step explanation:
Answer:
x=0.75 and Y=-4.5
Step-by-step explanation:
let x=3+1/2y.....(1)
-2x-y=3.......(2)
substitute (1) into (2)
-2(3+1/2y)-y=3
-6-y-y=3
-2y=9
y=-9/2
put y=-9/2 into (1)
x=3+(1/2)(-9/2)
x=-4.5
What is the equation of the axis of symmetry?
Answer:
x = 2
Step-by-step explanation:
Since the parabola is opening vertically up then the equation of symmetry is vertical and of the form x = c
The axis of symmetry passes through the vertex (2, 0), thus
equation of axis of symmetry is x = 2
ANSWER ASAP! In an arithmetic sequence, a17 = -40 and
a28 = -73. Explain how to use this information to write a recursive formula for this sequence.
Answer:
The Recursive Formula of sequence is: 8, 5, 2, -1, -4,...
Step-by-step explanation:
Arithmetic Sequence is a sequence in which every two neighbor digits have equal distances.
For finding the nth term, we use formula
aₙ = a + (n - 1) d
where, aₙ = value of nth term
a = First term
n = number of term
d = difference
We have given that,
a₁₇ = -40 ⇒ a₁₇ = a + (17 - 1)d
⇒ -40 = a + 16d → (1)
Also, a₂₈ = -73 ⇒ a₂₈ = a + (28 - 1)d
⇒ -73 = a + 27d → (2)
Solving, equation (1) and (2), We get
a = 8, d = -3
Hence, First term = a = 8
Second term = a + d = 8 - 3 = 5
Third term = 5 + d = 2
Fourth term = 2 + d = -1
Thus, The Arithmetic Sequence is: 8, 5, 2, -1, -4,...
Answer:
The difference between the given terms is
–73 – (–40) = –33.
The difference between the term numbers is 28 – 17 = 11.
Dividing –33 / 11 = –3.
The common difference is –3.
The recursive formula is the previous term minus 3, or an = an – 1 - 3 where a17 = -40.
Step-by-step explanation:
explanation is the answer above ^
edg answer
correct aswell
Enrollment in a school has grown exponentially since the school opened. A graph depicting this growth is shown. Determine the percentage rate of growth.
To find the percentage rate of growth, calculate the percentage change in enrollment from one year to the next using the graph. Perform these calculations for each pair of consecutive years to determine the overall percentage rate of growth.
Explanation:To determine the percentage rate of growth, we need to analyze the graph showing the enrollment growth of the school. Exponential growth is represented by a curve that increases more and more steeply over time. To find the rate of growth, we can calculate the percentage change in enrollment from one year to the next.
For example, if the enrollment was 100 in Year 1 and 200 in Year 2, the percentage change would be (200-100)/100 * 100 = 100%. This means the enrollment doubled from Year 1 to Year 2.
By performing similar calculations for each pair of consecutive years, we can find the percentage rate of growth over the entire period represented by the graph.
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The percentage rate of growth for the school's enrollment is approximately 24% per year.
Explaination:To determine the percentage rate of growth, we need to find the common ratio and the common difference in the exponential function that represents the school's enrollment. From the given graph, we can see that the enrollment doubles approximately every three years. This means that the common ratio is 2. The initial enrollment is 500, which is represented by the value "a" in the exponential function. The final enrollment, which is approximately 4000, is represented by "an". Using these values, we can write the exponential function as follows:
[tex]an = a * 2^(n-1)[/tex]
Substituting the initial enrollment and final enrollment in this equation, we get:
[tex]4000 = 500 * 2^(n-1)[/tex]
Dividing both sides by 500 and simplifying, we get:
[tex]8 = 2^(n-1)[/tex]
Taking the logarithm of both sides with base 2, we get:
(n-1) = log2(8)
(n-1) = 3
Adding 1 to both sides, we get:
n = 4
This means that it takes approximately four years for the school's enrollment to double. To find the percentage rate of growth per year, we need to find the common difference in the exponential function. The common difference is calculated as follows:
Common difference =[tex]ln(y2 / y1) / (x2 - x1)[/tex]
Here, x1 and x2 are two consecutive years, and y1 and y2 are their corresponding enrollments. Using this formula, we can calculate the common difference as follows:
Common difference = ln(4000 / 3200) / (7 - 4) = 0.263975 (approximately 24%) per year. This means that every year, the school's enrollment grows by approximately 24%.