Answer:
No, it is not a linear function. It is an exponential function.
Step-by-step explanation:
You have a secret that you tell to one person.
Every hour, each of the people that know the secret tells one person.
Let N be the people who know the secret.
Let t be the number of hours since you told the first person.
Now, when only you know the secret, means 1 person.
N(0) = 1
Next hour, there are now 2 people that know the secret.
N(1) = 2
After the next hour, these 2 people will tell 2 more people, so people doubled to 4.
N(2) = 4
One hour later it will be N(3) = 8
We can see the pattern as following.
[tex]N(t)=2^{t}[/tex]
Therefore, the function is exponential not linear.
Only the function represented by graph has an inverse function.
Answer:
2
Step-by-step explanation:
Only graph 2 shows a function that passes the horizontal line test. The other graphs will cross a horizontal line multiple times, meaning the function does not have an inverse.
Answer:
Graph 2: the linear function.Step-by-step explanation:
A function is invertible if its bijective: injective and surjective at the same time. But, graphically exist the horizontal line test to know if the function is injective, i.e., one to one: one element of the domain has a unique element in the image set.
So, in this case, the only function that can be cut once by a imaginary horizontal line is graph number 2. If we draw a horizontal line in other options, it will cut them in more than one point, meaning that they are not injective, therefore, not invertible.
Drag the tiles to the correct boxes to complete the pairs.
Match the subtraction expressions to their correct answers.
Answer:
Each part is solved and working is shown
Step-by-step explanation:
1)
[tex]-6\displaystyle\frac{4}{9}-3\displaystyle\frac{2}{9}-8\displaystyle\frac{2}{9}\\\\= -\displaystyle\frac{58}{9}-\displaystyle\frac{29}{9}-\displaystyle\frac{74}{9}\\\\= -\displaystyle\frac{161}{9}\\=-17\displaystyle\frac{8}{9}[/tex]
2)
[tex]-12.48-(-2.99) -5.62\\=-12.48 + 2.99 -5.62 \\=-15.11[/tex]
3)
[tex]-19\displaystyle\frac{2}{9}-4\displaystyle\frac{1}{9}+3\displaystyle\frac{4}{9}\\\\= -\displaystyle\frac{173}{9}-\displaystyle\frac{37}{9}+\displaystyle\frac{31}{9}\\\\= -\displaystyle\frac{179}{9}\\=-19\displaystyle\frac{8}{9}[/tex]
4)
[tex]-353.92 - (-283.56) - 131.29\\= -353.92 + 283.56 - 131.29\\= -201.65[/tex]
5)
[tex]83\displaystyle\frac{1}{5}-108\displaystyle\frac{2}{5} + 99\displaystyle\frac{1}{5}\\\\= \displaystyle\frac{416}{5}-\displaystyle\frac{542}{5}+\displaystyle\frac{496}{5}\\\\= -\displaystyle\frac{370}{5}\\= 74[/tex]
Answer:
Step-by-step explanation:
Please assist me with this problem.
Answer:
4
(We didn't even need to use (9,6) )
Step-by-step explanation:
The slope-intercept form a line is y=mx+b where m is the slope and b is the y-intercept.
We are given the line we are looking for has the same y-intercept as x+2y=8.
So if we put x+2y=8 into y=mx+b form we can actually easily determine the value for b.
So we are solving x+2y=8 for y:
x+2y=8
Subtract x on both sides:
2y=-x+8
Divide both sides by 2:
y=(-x+8)/2
Separate the fraction:
y=(-x/2)+(8/2)
Reduce the fractions (if there are any to reduce):
y=(-x/2)+4
Comparing this to y=mx+b we see that b is 4.
So the y-intercept is 4.
Again since we know that the line we are looking for has the same y-intercept, then the answer is 4 since the question is what is the y-intercept.
4
The city of Odessa, Texas is building a wheelchair ramp to make their courthouse accessible for persons in a wheel chair. The Americans with Disabilities Act (ADA) requires that a wheelchair ramp have an angle of elevation of 4.8°. The ADA guidelines also allow a maximum run of 30 feet of ramp before installing a rest platform. At the Odessa courthouse, the ramp must rise 2.5 feet to reach the top of the steps. Will they have to install a rest platform on their ramp?
Answer:
No they will not have to install a rest platform.
The ramp will be 29.88 feet long so they will not have to install a rest platform.
Step-by-step explanation:
Mike entered a science fair and needs to show the growth of his hybrid tomato plant over a three-month period. Which type of chart would best display this data?
A line graph would be the best type of chart to display the growth of Mike's hybrid tomato plant over a three-month period.
Explanation:The type of chart that would best display the growth of Mike's hybrid tomato plant over a three-month period is a line graph. A line graph is suitable for showing the changes in a variable over time, making it ideal for displaying the growth of the tomato plant.
Use point slope formula to find the equation perpendicular to y=-2x+9 passing through the points (0,7)
Answer:
y-7 = 1/2x point slope form
y = 1/2x+7 slope intercept form
Step-by-step explanation:
y=-2x+9
This equation is in the form y= mx +b so the slope is -2
We want a line perpendicular
Take the negative reciprocal
m perpendicular is - (-1/2)
m perpendicular = 1/2
We have a slope of 1/2 and a point. We can use point slope form
y-y1 = m(x-x1)
y-7 = 1/2(x-0) point slope form
y-7 = 1/2x
Adding 7 to each side
y-7+7 =1/2x +7
y = 1/2x+7 slope intercept form
A rectangular dartboard has an area of 648 square centimeters. The triangular part of the dartboard has an area of 162 square centimeters. A dart is randomly thrown at the dartboard. Assuming the dart lands in the rectangle, what is the probability that it lands inside the triangle? To the nearest whole percent, the probability is
Answer: 25%
Step-by-step explanation:
Given : A rectangular dartboard has an area of 648 square centimeters.
The triangular part of the dartboard has an area of 162 square centimeters.
If we assume that the dart lands in the rectangle, then the probability that it lands inside the triangle will be :-
[tex]\dfrac{\text{Area of triangular part}}{\text{Area of rectangular dart board}}\\\\=\dfrac{162}{648}=0.25[/tex]
In percent, [tex]0.25\times100=25\%[/tex]
Hence, the required probability = 25%
I need help with this problem.
Answer: y = -1/4x - 4
Step-by-step explanation:
y = (-1/4)x + 2 (This is the first linear function.)
(4,3) has slope of (-1/4)x or (1/-4)x
4(y2) - 4(y1= the new y -1(x2) -3(x1) = new x which leads to (0,-4) so y-intercept = -4
so all in all, y = (-1/4)x -4 is the answer
Hopefully, you're able to understand this. It's difficult to explain through typed words rather than visually and through a written example.
Same y intercept as x+4y=8 through (4,3)
Y intercept is when x=0, so 4y=8, so y=2 and the y intercept is (0,2)
Answer for y intercept: (0,2)
So we need the line through (0,2) and (4,3). Point-point form says the line through (a,b) and (c,d) is
(c-a)(y-b) = (d-b)(x-a)
(4 - 0)(y - 2) = (3 - 2)(x - 0)
4y - 8 = x
Answer for the line: x - 4y = -8
Check:
(0,2) is on the line: 0-4(2) = -8 check
(4,3) is on the line 4 - 4(3) = -8 check
HELPPPP
How would you write the following expression as a sum or difference?
Answer:
see below
Step-by-step explanation:
The applicable rules of logarithms are ...
log(a^b) = b·log(a)
log(a/b) = log(a) -log(b)
___
The expression can be rewritten as ...
[tex]\log{\dfrac{\sqrt[3]{2-x}}{3x}}=\log{\sqrt[3]{2-x}}-\log{3x}=\dfrac{1}{3}\log{(2-x)}-\log{(3x)}[/tex]
The expression can be written as a sum or difference as:
[tex]$$\boxed{\frac{1}{3} \log(2-x) - \log(3x)}$$[/tex]
How would you write the following expression as a sum or difference?To write the expression [tex]$\log(\frac{\sqrt[3]{2-x}}{3x})$[/tex] as a sum or difference, we can use the following logarithmic identities:
[tex]$\log(a/b) = \log(a) - \log(b)$[/tex]
[tex]$\log(a^n) = n \log(a)$[/tex]
First, we can use the first identity to split the logarithm of the fraction into two logarithms:
[tex]$$\log(\frac{\sqrt[3]{2-x}}{3x}) = \log(\sqrt[3]{2-x}) - \log(3x)$$[/tex]
Next, we can use the second identity to expand the logarithm of the cube root:
[tex]$$\log(\sqrt[3]{2-x}) = \log((2-x)^{1/3}) = \frac{1}{3} \log(2-x)$$[/tex]
Substituting this back into the first expression, we get:
[tex]$$\log(\frac{\sqrt[3]{2-x}}{3x}) = \frac{1}{3} \log(2-x) - \log(3x)$$[/tex]
Therefore, the expression can be written as a sum or difference as:
[tex]$$\boxed{\frac{1}{3} \log(2-x) - \log(3x)}$$[/tex]
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Noam chose 3 songs from a pile of 20 songs to play at a piano recital. What is the probability that she chose The Entertainer, Something Doing, and The Ragtime Dance?
[tex]|\Omega|={_{20}C_3}=\dfrac{20!}{3!17!}=\dfrac{18\cdot19\cdot20}{2\cdot3}=1140\\|A|=1\\\\P(A)=\dfrac{1}{1140}\approx0.09\%[/tex]
Answer:
0.014%
Step-by-step explanation:
To calculate the probability that she chooses that exact songs for the piano recital, you just first calculate the probability of her choosing one of them:
[tex]Probability of 1=\frac{1}{20}=.05[/tex]
This is 5%, now you multipy this with the probability of the second song after this one, since there is one less song, the total number of outcomes should be reduced to 19:
[tex]Probability of 2nd=(.05)(\frac{1}{19}[/tex]
[tex]Probability of 2nd=(0.05)(0.052}[/tex]
[tex]Probability of 2nd=0.002[/tex]
This would be .26%
To calculate the probability of the third song being chosen after the first two, we have 2 less outcomes possibles, so the total number of possibilities now is reduced to 18.
[tex]Probability of 3rd=(.0026)(\frac{1}{18}[/tex]
[tex]Probability of 3rd=(.0026)(0.055)[/tex]
[tex]Probability of 3rd=0.00014[/tex]
The probability of Noam choosing the three songs would be: 0.014%
Given f(x) and g(x) = k⋅f(x), use the graph to determine the value of k.
A.) 3
B.) 1/3
C.) -1/3
D.) -3
Answer:
-3 is the value of k in g(x)=kf(x)
Step-by-step explanation:
Both functions cross nicely at x=-3 so I'm going to plug in -3 for x:
g(x)=kf(x)
g(-3)=kf(-3)
To solve this for k we will need to find the values for both g(-3) and f(-3).
g(-3) means we want the y that corresponds to x=-3 on the curve/line of g.
g(-3)=-3
f(-3) means we want the y that corresponds to x=-3 on the curve/line of f.
f(-3)=1
So our equation becomes:
g(-3)=kf(-3)
-3=k(1)
-3=k
So k=-3.
This is about interpretation of graphs.
Option C is correct.
From the graph, we can see the 2 lines representing function f(x) and function g(x). Now for us to find the value of x in g(x) = k⋅f(x), we need get a mutual x-coordinate where we can easily read their respective y-coordinate values.We see that the best point for that is where x = -3.
For f(x), when x = -3, y = 1For g(x), when x = -3, y = -3we can rewrite them as;
x = -3, f(-3) = 1 and x = -3, g(-3) = -3
Let us plug in the relevant values into g(x) = k⋅f(x) to get;-3 = k(1)
Thus; k = -1/3
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A circle has a radius of 10.9 cm. If the area is multiplied by 6, what happens to the radius? HELP ASAP!!
The radius is multiplied by √6
The radius is multiplied by 6.
The radius is multiplied by 36.
Answer:
root 6
Step-by-step explanation:
pi*r^2 = A
6*pi*r^2 = 6A
6*r^2 = new radius squared
root 6 * r = new radius
The correct answer is option 1) The radius is multiplied by [tex]\sqrt{6}[/tex]
[tex]A = \pi r^2[/tex]
where A is the area and r is the radius.
If the area is multiplied by 6, we can represent this with the following equation:
A' = 6A
where A' is the new area and let r' be its radius.
[tex]A' = \pi (r')^2[/tex]
Substituting this into the equation for the new area gives us:
[tex]\pi (r')^2 = 6*(\pi r^2)[/tex]
To solve for r', we can divide both sides of the equation by [tex]\pi[/tex]:
[tex](r')^2 = 6r^2[/tex]
Next, take the square root of both sides to solve for r':
[tex]r' = \sqrt{6}r[/tex]
Therefore, the new radius r' is the original radius r multiplied by [tex]\sqrt{6}[/tex].
I need help with these. They are hard.
Answer:
Find the explicit from for the sequence [tex]t_n=t_{n-1}+4,t=6[/tex]:
[tex]a_n=4n+2[/tex]
This next question I edited a bit. Your question just says find the four terms. I'm assuming they meant the first four. I also changed the c to an [tex]a[/tex].
Find the first four terms of the sequence given by: [tex]a_n=n a_{n-1}-3,a_1=2[/tex]:
a) 2,1,0.-3
You might want to read that second question again because there is errors in the question or things that don't really make sense. I made my own interpretation of the problem based on my own mathematical experience.
Step-by-step explanation:
So your first question actually says that you can find a term by taking that term's previous term and adding 4.
So more terms of the sequence starting at first term 6 is:
6,10,14,18,....
This is an arithmetic sequence. When thinking of arithmetic sequences you should just really by thinking about equations of lines.
Let's say we have this table for (x,y):
x | y
----------
1 6
2 10
3 14
4 18
So we already know the slope which is the common difference of an arithmetic sequence.
We also know point slope form of a line is [tex]y-y_1=m(x-x_1)[/tex] where m is the slope and [tex](x_1,y_1)[/tex] is a point on the line. You can use any point on the line. I'm going to use the first point (1,6) with my slope=4.
[tex]y-6=4(x-1)[/tex]
[tex]y=6+4(x-1)[/tex] :I added 6 on both sides here.
[tex]y=6+4x-4[/tex] :I distribute here.
[tex]y=4x+2[/tex] :This is what I get after combining like terms.
So [tex]a_n=y[/tex] and [tex]x=n[/tex] so you have:
[tex]a_n=4n+2[/tex]
---------------------------------------------------------------------------------------
The first four terms of this sequence will be given by:
[tex]a_1,a_2,a_3,a_4[/tex]
[tex]a_1=2[/tex] so it is between choice a, c, and d.
[tex]a_n=na_{n-1}-3[/tex]
To find [tex]a_2[/tex] replace n with 2:
[tex]a_2=2a_{1}-3[/tex]
[tex]a_2=2(2)-3[/tex]
[tex]a_2=4-3[/tex]
[tex]a_2=1[/tex]
So we have to go another further the only one that has first two terms 2,1 is choice a.
Subtract: (x^2 - 8x + 5)-(-3x^2 + 5x-9)
Answer: 4x^2 -13x + 14
Step-by-step explanation:
(x^2 - 8x + 5)-(-3x^2 + 5x-9)
Subtract -3x^2 from x^2
(4x^2 - 8x + 5)-(5x-9)
Subtract 5x from -8x
(4x^2 -13x + 5)-(-9)
Subtract 9 from 5
4x^2 -13x + 14
In the diagram, transversal t cuts parallel lines a and b. Which equation is necessarily true?
A.
m∠1 = m∠7
B.
m∠3 = m∠6
C.
m∠5 + m∠8 = 90°
D.
m∠6 + m∠7 = 180°
Answer:
The correct answer is option B.
m<3 = m<6
Step-by-step explanation:
From the figure we an see that, a and b are parallel lines and line t is the traversal on the lines.
To find the correct option
From the given figure we get
Corresponding angles are,
<1 & <5, <2&<6, <2&<7 and <4 &<8
Alternate interior angles are,
<3 & <6 and <4 &<5
Alternate interior angles are equal.
m<3 = m<6
Therefore the correct answer is optionB
The yearly profit or loss for a clothing store is shown for a period of three years. Use a calculator to determine the clothing strore’s overall profit or loss in the three years.
Answer:
loss of $12,481.38
Step-by-step explanation:
It is usually a good idea to follow directions. (See attached.)
The sum of the three profit values is -$12,481.38, indicating a loss in the 3-year period.
The simple interest formula is l=prt where l represents simple interest on an amount p for t years at a rate of r where r is expressed as a decimal. What is the amount of money p that will generate $40 in interest at a 10% interest rate over 5 years
Answer: $80
Step-by-step explanation:
Given : Interest amount : [tex]T=\$40[/tex]
The rate of interest : [tex]r=10\%=0.1[/tex]
Time period : [tex]t=5[/tex] years
The simple interest formula is
[tex]l=prt[/tex], where l represents simple interest on an amount p for t years at a rate of r where r is expressed as a decimal.
Substitute all the values in the formula , we get
[tex]40=p(0.1)(5)\\\\\Rightarrow\ p=\dfrac{40}{0.1\times5}=80[/tex]
Hence, the amount of money p that will generate $40 in interest at a 10% interest rate over 5 years= $80
The amount of money (p) required to generate $40 in interest at a 10% interest rate over 5 years is $80.
What is the principal needed?Given the parameters:
Simple interest l = $40
Interest rate r = 10% = 10/100 = 0.10
Time t = 5 years
To determine the amount of money (p) that will generate $40 in interest at a 10% interest rate over 5 years, we use the simple interest formula:
I = P × r × t
Solve for p:
P = I / rt
Plug in the values
P = $40 / ( 0.10 × 5 )
P = $40 / 0.5
P = $80
Therefore, the value of the principal is $80.
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If two lines are perpendicular, their slopes are negative reciprocals.
Answer:
true
Step-by-step explanation:
yes, that is true. Parallel lines have equal slopes and perpendicular lines have negative reciprocal slopes (or opposite reciprocals, the "opposite" being the sign).
The statement "If two lines are perpendicular, their slopes are negative reciprocals." is: True
What is the slope of perpendicular lines?The general form for the equation of a line in slope intercept form is:
y = mx + c
where:
m is slope
c is y-intercept
We know that when two lines are parallel, that their slopes are the same. However, when two lines are perpendicular, then their slopes are negative reciprocals of each other.
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Find the cosine of angle Z
Answer:
[tex]cosZ=\frac{3}{5}[/tex]
Step-by-step explanation:
Cos of an angle by definition of its ratio is side adjacent/hypotenuse. The side adjacent to angle Z cannot be the hypotenuse, so it has to be 6. The hypotenuse is 10. Therefore,
[tex]cosZ=\frac{6}{10}=\frac{3}{5}[/tex]
The length of a rectangle is 4 m less than the diagonal and the width is 5 m less than the diagonal. If the area is 82 m^2, how long is the diagonal in meters? Round your answers to the nearest tenth.
I hate rounding.
Let's call the diagonal x. It's the hypotenuse of the right triangle whose legs are the rectangle sides.
According to the problem we have a length x-4 and a width x-5 and an area
82 = (x-4)(x-5)
82 = x^2 - 9x + 20
0 = x^2 - 9x - 62
That one doesn't seem to factor so we go to the quadratic formula
[tex]x = \frac 1 2(9 \pm \sqrt{9^2-4(62)}) = \frac 1 2(9 \pm \sqrt{329})[/tex]
Only the positive value makes any sense for this problem, so we conclude
[tex]x = \frac 1 2(9 \pm \sqrt{329})[/tex]
That's the exact answer. Did I mention I hate rounding? That's about
x = 13.6 meters
Answer: 13.6
----------
It's not clear to me this problem is consistent. By the Pythagorean Theorem the diagonal satisfies
[tex]x^2 = (x-4)^2 + (x-5)^2[/tex]
which works out to
[tex]x=9 \pm 2\sqrt{10}[/tex]
That's not consistent with the first answer; this problem really has no solution. Tell your teacher to get better material.
To find the length of the diagonal, we can use the formula for the area of a rectangle and quadratic equation. By substituting the given values and solving for D, we can find the length of the diagonal.
Explanation:To solve this problem, we can use the formula for the area of a rectangle: length * width = area. Let's represent the length of the rectangle as L, the width as W, and the diagonal as D. According to the problem, L = D - 4 and W = D - 5, and the area is given as 82 m2. We can substitute these values into the formula and solve for D.
L * W = area
(D - 4) * (D - 5) = 82
Expanding and rearranging the equation, we get:
D2 - 9D - 82 = 0
Next, we can solve this quadratic equation either by factoring or by using the quadratic formula. After finding the value of D, we can round it to the nearest tenth to obtain the length of the diagonal.
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1. Write 3,876,943,000 using scientific notation.
Use the 1x10^6 style format for entering your answer. No spaces between characters.
2. Write 0.0007317 using scientific notation.
Use the 1x10^-6 style format for entering your answer. No spaces between characters.
Answer:
3.876943x10^9
7.317x10^-4
Step-by-step explanation:
3,876,943,000
Put the decimal at the end
3,876,943,000.
Move it so only 1 number is before the decimal
3.876943000
We moved it 9 places, so that is the exponent
We moved it to the left, so the exponent is positive
The three zeros at the end can be dropped because they are the last numbers to the right of the decimal
3.876943x10^9
0.0007317
Move it so only 1 number is before the decimal
00007.317
We moved it 4 places, so that is the exponent
We moved it to the right, so the exponent is negative
The four zeros at the left can be dropped because they are the last numbers to the left of the whole number
7.317x10^-4
A security alarm requires a four digit code the code can use the digits 0-9 and the digits cannot be repeated what is the approximate probability that the code contains only odd numbers
Answer:
Probability = 0.2381
Step-by-step explanation:
A security alarm requires a four digit code by using 0 - 9 and the digits cannot be repeated.
First we calculate how many codes can be made.
Combination = [tex]^{n}p_{r}[/tex]
Where n = 10 and r = 4
[tex]^{n}p_{r}[/tex] = [tex]\frac{10!}{(10-4)!}[/tex]
= [tex]\frac{10!}{6!}[/tex]
= 10 × 9 × 8 × 7
= 5,040 combinations.
Now we have to find the probability that the code contains only odd numbers. So in 0-9 the odd numbers are = 1, 3, 5, 7, 9
There are 5 odd numbers and we have to make a code of 4 numbers.
Therefore, On first place there are 5 options and in second place 4 options, in third place there are 3 options and in fourth place we have only 2 options.
5 × 4 × 3 × 2 = 120 combinations.
Total combinations of odd numbers are 120.
Then the probability that the code contains only odd numbers is
[tex]p=\frac{120}{5040}[/tex] = 0.0238095 ≈ 0.02381
Probability = 0.2381
The approximate probability that the code contains only odd numbers is 0.0238.
Explanation:The probability of the code containing only odd numbers can be found by determining the number of possible combinations of four odd digits out of the total number of possible combinations of four digits.
To calculate this, we first count the number of odd digits from 0 to 9, which is 5. Then, we determine the number of combinations of 4 digits that can be formed from the 5 odd digits, which is 5C4 or 5.
The total number of possible combinations of four digits without repetition is 10C4 or 210. Therefore, the probability of the code containing only odd numbers is 5/210 or approximately 0.0238.
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The sum of three numbers is 62. The second number is equal to the first number diminished by 4. The third number is four times the first. What are the numbers?.
Answer:
11, 7, 44
Step-by-step explanation:
Let x represent the first number. Then the second is (x-4) and the third is (4x). Their sum is ...
x +(x -4) +(4x) = 62
6x = 66 . . . . . . . . . . . . add 4, collect terms
x = 11 . . . . . . . . . divide by 6
x -4 = 7 . . . . . . . find the second number
4x = 44 . . . . . . . find the third number
The three numbers are 11, 7, and 44.
Find the GCF of the following numbers:
2^5 x 3^7 and 2^7 x 3^5
Answer = 2^? x 3^? AKA 2 to the power of what multiplied by 3 to the power of what
13 POINTS! NEED ANSWER QUICK! THANKS!
Answer:
[tex]2^53^5[/tex]
Step-by-step explanation:
So if we compare [tex]2^5 \cdot 3^7[/tex] to [tex]2^7 \cdot 3^5[/tex], we should see the most amount of factors of 2 that they have in common is 5 and the most amount of factors of 3 that they have in common is 5.
If you aren't sure on the number of factors of 2 and 3 they have in common you could write it all out:
[tex]2^53^7=(2)(2)(2)(2)(2)\cdot\text{ }(3)(3)(3)(3)(3)(3)(3[/tex]
[tex]2^73^5=(2)(2)(2)(2)(2)(2)(2)\text{ }(3)(3)(3)(3)(3)[/tex]
So if I were able to circle each pair of 2's they had in common I would circle 5 pairs.
If were able to circle each pair of 3's they had in common I would circle 5 pairs.
The city of Austin is erecting a radio tower to boost cell phone coverage. They must install guy wires to support the tower in the wind. The guy-wires must attach to the tower at a point 56 feet above the base of the tower, and must form a 50° angle with the ground. Assuming that the tower is on level ground, how far from the base of the tower will the guy-wires be secured to the ground?
Answer:
47 ft
Step-by-step explanation:
The base of the tower, the guy-wires be secured to the ground will be 73.1 feet.
What are trigonometric identities?Trigonometric identities are the functions that include trigonometric functions such as sine, cosine, tangents, secant, and, cot.
Sinθ = a/b
Where θ = angle to the horizontal, a = Height of the tower, and b = length of the wire.
Also, b = a/sinθ
Given: a = 56 feet, θ = 50°
Substitute these values into equation;
b = 56 /sin 50°
b = 56/0.766
b = 73.1 feet
Learn more about trigonometric;
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Pizza delivery times at Pizza Time are normally distributed with a mean time of 27 minutes and a standard deviation of 3 minutes. Using the empirical rule, approximately what percent of pizzas are delivered between 24 and 30 minutes?
32%
68%
95%
99.7%
Answer: Second Option
68%
Step-by-step explanation:
First we calculate the Z-scores
We know the mean and the standard deviation.
The mean is:
[tex]\mu=27[/tex]
The standard deviation is:
[tex]\sigma=3[/tex]
The z-score formula is:
[tex]Z = \frac{x-\mu}{\sigma}[/tex]
For x=24 the Z-score is:
[tex]Z_{24}=\frac{24-27}{3}=-1[/tex]
For x=30 the Z-score is:
[tex]Z_{30}=\frac{30-27}{3}=1[/tex]
Then we look for the percentage of the data that is between [tex]-1 <Z <1[/tex] deviations from the mean.
According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of pizzas are delivered between 24 and 30 minutes
The number N = 100 + 100^2 + 100^3 + ... + 100^n . Find the least possible value of n such that the number N is divisible by 11. NEED QUICKLY! Thanks!!!
Answer:
n = 11
Step-by-step explanation:
100 mod 11 = 1, which is the remainder from division by 11 for each of the terms of the sum. 11 terms of the sum are needed in order to make the remainders add up to a number divisible by 11.
The mean number of births per minute in a country in a recent year was about three. Find the probability that the number of births in any given minute is (a) exactly four, (b) at least four, and (c) more than four.
Final answer:
To find the probability, we use the Poisson probability formula with a mean of three. The probability of exactly four births is 0.168, the probability of at least four births is 0.361, and the probability of more than four births is 0.193.
Explanation:
To find the probability in each case, we will use the Poisson probability formula since the number of births per minute in a country follows a Poisson distribution with a mean of three.
(a) Exactly four births in a minute:
The probability of exactly four births in a minute can be calculated using the Poisson probability formula:
P(X = 4) = (e⁻³* 3⁴) / 4! = 0.168
(b) At least four births in a minute:
The probability of at least four births in a minute is the complement of the probability of having three or fewer births in a minute:
P(X ≥ 4) = 1 - P(X ≤ 3) = 1 - (P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)) = 1 - (0.049 + 0.147 + 0.221 + 0.222) = 0.361
(c) More than four births in a minute:
The probability of more than four births in a minute is the complement of the probability of having four or fewer births in a minute:
P(X > 4) = 1 - P(X ≤ 4) = 1 - (P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)) = 1 - (0.049 + 0.147 + 0.221 + 0.222 + 0.168) = 0.193
A metallurgist has an alloy with 16% titanium and an alloy with 30% titanium. He needs 100 grams of an alloy with 23% titanium. How much of each alloy should be mixed to attain the 100 grams of alloy with 23% titanium?
nothing grams of the alloy with 16% of titanium are needed.
Let x = amount of 16% alloy, and y = amount of 30% alloy he should use.
Mixing the alloys will result in a compound weighing x + y = 100 grams.
For each gram of the 16% alloy used, 0.16 gram of titanium is contributed; similarly, for each gram of the 30% alloy used, there's a contribution of 0.3 gram. He wants to end up with an alloy of 23% titanium, or 23 grams (23% of 100), so that 0.16x + 0.3y = 23.
Solve the system:
[tex]x+y=100\implies y=100-x[/tex]
[tex]0.16x+0.3y=23\implies 0.16x+0.3(100-x)=23\implies7=0.14x[/tex]
[tex]\implies\boxed{x=50}\implies\boxed{y=50}[/tex]
AC, DF, and GI are parallel. Use the figure to complete the proportion. (7)
Answer:
The answer is
C.) BE
AD/AG=BE/BH
Answer:
Option C
Step-by-step explanation:
We have to find the value in the blank space
We are given that AC,DF and GI are parallel
We know that by middle splitting theorem
We have
[tex]\frac{JD}{AD}=\frac{JE}{BE}[/tex]
Because AC is parallel to DF and A and B are the mid points of JD and JE
[tex]\frac{JD}{GD}=\frac{JE}{EH}[/tex]
Because DF is parallel to GI
Divide equation one by equation second then we get
[tex]\frac{GD}{AD}=\frac{EH}{BE}[/tex]
Adding one on both sides then we get
[tex]\frac{GD}{AD}+1=\frac{BE}{EH}+1[/tex]
[tex]\frac{GD+AD}{AD}=\frac{BE+EH}{BE}[/tex]
[tex]\frac{AG}{AD}=\frac{BH}{BE}[/tex]
Because BE+EH=BH and AD+GD=AG
Reciprocal on both sides then we get
[tex]\frac{AD}{AG}=\frac{BE}{BH}[/tex]
Hence, option C is true.