Answer:
69.1
Step-by-step explanation:
Mean height of 14 students = 69.0 inches
Mean = sum of data/number of data
69 = sum of data/14
sum of data = 966
FOR NEW MEAN:
Height of additional student = 70.5
Mean = sum of data/ number of data
Mean = 966+70.5/14+1
Mean = 1036.5/15
Mean = 69.1
Therefore, the mean height of the 15 students in the class is 69.1
Final answer:
To find the new mean height after Danielle joins the class, calculate the total height of all students, add Danielle's height, and divide by the new number of students. The mean height increases to 69.1 inches.
Explanation:
Mr. Zuro finds the mean height of all 14 students in his class to be 69.0 inches. When Danielle, who is 70.5 inches tall, walks in late, we need to calculate the new mean height of all 15 students.
First, we find the total height of the initial 14 students by multiplying the mean height by the number of students: 69.0 inches × 14 = 966 inches. Next, we add Danielle's height to this total: 966 inches + 70.5 inches = 1036.5 inches. Finally, to find the new mean height, we divide this total by the number of students, now 15: 1036.5 inches ÷ 15 = 69.1 inches.
Therefore, the mean height of the 15 students in the class, including Danielle, is now 69.1 inches.
Two coins are tossed simultaneously,Find the probability of getting.1.atleast one head.2.at most one tail
If two coins are tossed simultaneously, you will have one of the possible results
[tex]HH,\ HT,\ TH,\ TT[/tex]
with probability 1/4 each.
So, you'll have at least one head if you have HH, HT or TH, i.e. with probability 3/4.
Similarly, you have at most one tail if you get HH, HT or TH, so the probability will be the same.
In fact, both claims (at least one head and at most one tail) are verified by the same set of outputs HH, TH, HT, since they're not satisfied only by the output HH.
So, if those claims are not satisfied with probability 1/4, they're satisfied with probability 3/4.
Final answer:
The probability of getting at least one head when tossing two coins is 0.75.
When two coins are tossed simultaneously, the sample space consists of the following possible outcomes: {HH, HT, TH, TT}. To find the probability of getting at least one head, we can count the favorable outcomes which include at least one head: these are HH, HT, and TH. Thus, there are 3 favorable outcomes.
The total number of possible outcomes is 4. Therefore, the probability is 3 out of 4, or
0.75.
To find the probability of getting at most one tail, we consider the favorable outcomes: these are HH, HT, and TH. Again, we can see there are 3 favorable outcomes.
Since the total number of outcomes is the same, the probability remains
0.75.
The book display has 8 histories, 12 biographies, and 24 novels. Write the ratio of biographies to histories.
Answer:
12:8
Step-by-step explanation:
The ratio of biographies to histories is 1.5, or more simply as a whole number ratio, 3:2. This means that for every 3 biographies, there are 2 history books.
Explanation:The question wants us to calculate the ratio of the number of biographies to the number of histories in the book display. To do this, simply divide the number of biographies by the number of histories. The problem provides the number of biographies as 12 and the number of histories as 8. Thus, the ratio is: 12 (biographies) / 8 (histories) = 1.5.
In other words, for every 1.5 biographies, there is 1 history book on the display. However, since ratios are commonly expressed as whole numbers, we can multiply both sides by 2 to get the ratio as 3:2, meaning for every 3 biographies, there are 2 history books. This provides a cleaner and more interpretable ratio.
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When members of the military are in a combat zone, they often eat meals-ready-to-eat (MREs). A typical MRE contains 1 comma 600 calories. If the average soldier eats 3 MREs per day and is deployed for 12 months, approximately how many calories will be consumed by a 37-member platoon of soldiers?
The number of calories by a 37-member platoon of soldiers will be 6,48,24000 calories.
What are calories?A calorie is a unit of energy. Energy is defined as the capacity to do work.
Now it is given that,
Calories contain in 1 MRE = 1,600
Number of MREs taken by a soldier per day = 3
Therefore, number of calories taken by soldier per day = 3*1600
= 4800 calories
Therefore, number of calories taken by 37 soldier per day = 37*4800
= 1,77,600 calories
Now since, 12 months = 365 days
⇒Number of calories taken by 37 soldier in 12 months = 365*1,77,600
⇒Number of calories taken by 37 soldier in 12 months =6,48,24000 calories.
Hence,The number of calories by a 37-member platoon of soldiers will be 6,48,24000 calories.
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there are 52 legs and they all belong to hamsters.how many hamsters are there
There are 52 legs and they all belong to hamsters. so 13 Hamsters are there.
Are hamsters a good pet?Hamsters are rodents from the subfamily Cricetinae, which includes 19 species divided into seven genera. They have established themselves as popular tiny pets. The golden or Syrian hamster is the most well-known species of hamster and is the variety most usually kept as a pet.Hamsters are terrific pets for many people. They don't take much attention, receive adequate exercise when running on their wheel, and are attractive, cuddly, and enjoyable to hold. Some children may find them to be a good first pet. Hamsters, however, do not come with care instructions.Total No. of legs = 52
Each hamsters have 4 legs.
No. of Hamster = 52/4 =13 Hamsters
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this is really hard and I need help
Answer:
No solution
Step-by-step explanation:
Subtract 5k from both sides
Simplify
No solution
A bakery sold 16 apple pie on Saturday they sold 4 more apple pies on Sunday than they did on Saturday how many apple pies did they sell on Sunday
Answer:
20 apple pies
Step-by-step explanation:
On Saturday they sold 16, while on Sunday they sold 4 more.
16+4 = 20.
20 apple pies.
What is the probability of rolling a 6-sided die and getting a 4 or a number
divisible by 3?
Event A = rolling a 4 on a single die
Event B = rolling a number divisible by 3 (3 or 6) on a single die
There are three outcomes possible in total if either event A happens or event B happens. This is out of six outcomes total.
Divide the values and reduce: 3/6 = 1/2
Final Answer: 1/2
3 thousand divided 10 in unit and standard form
Answer:
300
Step-by-step explanation:
Divide 3000 by 10 by striking out each zero one-by-one [300 ÷ 1] to get 300. This is one of the fastest ways to solve with zeros.
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The result would be 300 units and 320 units respectively.
3 thousand divided by 10 in unit and standard form:
To divide 3,000 by 10 in unit form: 3,000 ÷ 10 = 300 units.
To divide 3,000 by 10 in standard form: 3.2 × 10³ ÷ 10¹ = 3.2 × 10² = 320 units.
| n+2 | = 7 absolute value
Answer:
Step-by-step explanation:
| n+2 | = 7 : n+2 = 7 or n+2 = -7
n=5 or n = - 9
For which of the following equations is (-4,-3) not a solution?
A.) 5x+2y=-26
B.) y=1+x
C.) 2y-3x=6
D.) -3x=4y
Answer:
D.) -3x = 4y
Step-by-step explanation:
[tex] -3(-4) ≠ 4(-3) \\ \\ 12 ≠ -12[/tex]
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The point (-4,-3) is not a solution to both Equation C: 2y-3x=6 and Equation D: -3x=4y. This is determined by substituting x with -4 and y with -3 in each equation and checking if the equation is balanced.
Explanation:To find which equation (-4,-3) is not a solution to, we substitute x with -4 and y with -3 into each equation, then see if both sides of the equation are equal.
For equation A: 5(-4) + 2(-3) equals -20 - 6, which is -26. So, (-4,-3) is a solution to this equation.For equation B: -3 equals 1 + (-4), which is -3. So, (-4,-3) is also a solution to this equation.For equation C: 2(-3) - 3(-4) equals -6 + 12, which equals 6. This equation does not equal 6. Therefore (-4,-3) is not a solution to this equation. For equation D: -3 equals 4*(-4), which is -16. This equation does not equal -16. So, (-4,-3) is also not a solution to this equation.So, (-4,-3) is not a solution to both Equation C: 2y-3x=6 and Equation D: -3x=4y.
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what is the substitution of 7+3x=1???
Answer:x= -2
Step-by-step explanation:
Slope intercept form of y=3x+4 passing through (0,9)
Answer:
y = 3x + 9
Step-by-step explanation:
9 = 3[0] + b
0
9 = b
y = 3x + 9
This would be considered a parallel line, so 3 remains the way it is.
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5. Write the phrase as an algebraic expression.
6 less than a number times 11
@ 6y - 11y © 11y - 6
6 11=Y
11+ y
Anna's running time for a race was 23.1 seconds.Another runner's time was 5.86 seconds faster.Find the other Runners time
Answer:
17.24
Step-by-step explanation:
Simple subtraction of decimals because the other runner was faster:
23.10
-5.86
=
17.24
The other Runner's time is 17.24 seconds.
What are Arithmetic operations?Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.
Operators which let do a basic mathematical calculation
+ Addition operation: Adds values on either side of the operator.
For example 12 + 2 = 14
- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.
for example 12 -2 = 10
* Multiplication operation: Multiplies values on either side of the operator
For example 12*2 = 24
Given that Anna's running time for a race was 23.1 seconds
And another runner's time was 5.86 seconds faster
It took Anna 23.1 seconds to complete a race.
Since the other runner was quicker,
So we did a simple decimal subtraction,
⇒ 23.10 - 5.86
⇒ 17.24
So, It took other runners 17.24 seconds to complete a race.
Hence, the other Runner's time is 17.24 seconds.
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Write 454.12kg with 3 significant
Answer: 454
Step-by-step explanation:
The first three digits will be the significant digits. Round the third digit.
454.12
the digit and the 4 is 1 so 454.12 is rounded to 454
I really don't know if I'm doing this right and I have a test coming up (I only need the answer for the odds)
Answer:
all work is shown and pictured
-50-2 - 8m) = 10 + 5m
Answer:
-4 10/13
Step-by-step explanation:
-52-8m = 10 + 5m
-8m = 62 +5m
-13m = 62
-m = 62/13
m = - 62/13
m = -4 10/13
The length of a rectangular frame is represented by the expression 2x+4 and the width of the rectangular frame is represented by the expression 2x+10. Write an equation to solve for the width of a rectangular frame that has a total area of 120 square inches
2x^2+20x-80=0
4x^2+28x+40=0
4x^2+28x-80=0
x^2+8x+20=0
Answer:
4x^2 + 28x - 80=0
Step-by-step explanation:
(2x+4)(2x+10) = 120
1. Use FOIL (Distribute):
4x^2 + 20x +8x + 40 = 120
2. Group like terms:
4x^2 + 28x+ 40 = 120
3. Subtract 120 from both sides:
4x^2 + 28x - 80 = 0
Answer:
Option 3 - [tex]4x^2+28x-80=0[/tex]
Step-by-step explanation:
We have given,
The length of a rectangular frame is represented by the expression L=2x+4.
The width of the rectangular frame is represented by the expression B=2x+10.
The total area of a rectangular frame is A=120 square inches.
To find : Write an equation to solve for the width of a rectangular frame ?
Solution :
The area of the rectangle is given by,
[tex]\text{Area}=\text{Length}\times \text{Breadth}[/tex]
Substitute the values,
[tex]120=(2x+4)\times(2x+10)[/tex]
[tex]120=4x^2+20x+8x+40[/tex]
[tex]4x^2+28x+40-120=0[/tex]
[tex]4x^2+28x-80=0[/tex]
The required equation is [tex]4x^2+28x-80=0[/tex]
Therefore, option 3 is correct.
Multiplier of 5/7=30/42
Answer:
6
Step-by-step explanation:
5*6=30
7*6=42
Hey!
---------------------
Solution:
30 / 5 = 6
42 / 7 = 6
5 x 6 = 30
7 x 6 = 42
---------------------
Answer:
Multiplier is 6!
---------------------
Hope This Helped! Good Luck!
Sally has a savings account. She
deposited $200 into her savings
account last year and has been taking
out $10 monthly to go to the movies.
Sally now was $80 in her account. How
many months has she been
withdrawing money?
The elevation of your plot of land is 2 feet below sea level. You add 7 feet of dirt to your land. What is the new elevation of your land?
Answer: 5
Step-by-step explanation: -2+7=5
when the signs are different you subtract and when the signs are the same you add. Then you keep the sign of the bigger number.
HELP HELP HELP PLEASE ASAP
Answer:
Its Brand 2 :) also do you do connexus?
if so whats ur name :)
Step-by-step explanation:
Answer:
brand 4
Step-by-step explanation:
A train leaves the station at 6 pm traveling west at 80 mph. On a parallel track, a second train leaves the station 3 hours later traveling west at 100 mph. At what time will the second train catch up with the first?
Answer:
Step-by-step explanation:
Start train 1 at 6 pm an train 2 at 9pm
change 0.72 to a percent
Write 19h15min into a fraction
Answer:
19 1/4 hours
Step-by-step explanation:
19 h 15 min = 19 hours + 15 minutes
= 19 hours + (15/60) hours
= 19 + 1/4
= 19 1/4 hours
A triangle has one side that is 5 inches long and the other two sides are both of length x. Write an expression for the perimeter of the triangle in terms of x and then use the expression to find the perimeter when x=10.
Let P = perimeter
P = 3x + 5
Let x = 10
P = 3(10) + 5
P = 30 + 5
P = 35
Henry can write 5 pages of his novel in 3 hours. At this rate, how many pages can Henry write in 8 hours?
Given that Henry can write 5 pages in 3 hours, his rate is 5/3 pages per hour. Multiplying this rate by 8 hours, we get approximately 13.33 pages. Therefore, Henry can write approximately 13 to 14 pages in 8 hours at the given rate.
Explanation:The subject of this question is mathematics, specifically, it is dealing with the concept of rates. Given that Henry can write 5 pages in 3 hours, we can set up a rate, which is simply a ratio that compares quantities in different units. So, Henry's rate of writing is 5/3 pages per hour.
To find out how many pages Henry can write in 8 hours at this rate, we multiply his rate (5/3) by the number of hours (8 hours). So, (5/3) x 8 = 40/3 = 13.33. However, since we cannot have a fraction of a page, we can round this to 13 pages for a conservative estimate or to 14 pages for a liberal estimate.
So, at the rate given, Henry can write approximately 13 to 14 pages in 8 hours.
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Henry can write approximately 13.33 pages in 8 hours.
Explanation:To find out how many pages Henry can write in 8 hours, we can set up a proportion using the given information.
Since Henry can write 5 pages in 3 hours, we can write the proportion as 5/3 = x/8.
To solve for x, we can cross multiply and then divide to find that x = 40/3.
So, Henry can write approximately 13.33 pages in 8 hours.
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A circle passes through points A(7,4), B(10,6), C(12,3). Show that AC must be the diameter of the circle.
I've spent ages on this question and I still can't get it...
so we have three points, A, B and C, if indeed AC is the diameter of the circle, then half the distance of AC is its radius, and the midpoint of AC is the center of the circle, morever, since B is also on the circle, the distance from B to the center must be the same radius distance.
in short, half the distance of AC must be equals to the distance of B to the midpoint of AC, if indeed AC is the diameter.
[tex]\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{7}~,~\stackrel{y_1}{4})\qquad C(\stackrel{x_2}{12}~,~\stackrel{y_2}{3}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{12+7}{2}~~,~~\cfrac{3+4}{2} \right)\implies \left( \cfrac{19}{2}~~,~~\cfrac{7}{2} \right)=M\impliedby \textit{center of the circle}[/tex]
now, let's check the distance from say A to the center, and check the distance of B to the center, if it's indeed the center, they'll be the same and thus AC its diameter.
[tex]\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ A(\stackrel{x_1}{7}~,~\stackrel{y_1}{4})\qquad M(\stackrel{x_2}{\frac{19}{2}}~,~\stackrel{y_2}{\frac{7}{2}})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ AM=\sqrt{\left( \frac{19}{2}-7 \right)^2+\left( \frac{7}{2}-4 \right)^2} \\\\\\ AM=\sqrt{\left( \frac{5}{2}\right)^2+\left( -\frac{1}{2} \right)^2}\implies \boxed{AM\approx 2.549509756796392} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ B(\stackrel{x_1}{10}~,~\stackrel{y_1}{6})\qquad M(\stackrel{x_2}{\frac{19}{2}}~,~\stackrel{y_2}{\frac{7}{2}}) \\\\\\ BM=\sqrt{\left( \frac{19}{2}-10 \right)^2+\left( \frac{7}{2}-6 \right)^2} \\\\\\ BM=\sqrt{\left( -\frac{1}{2}\right)^2+\left( -\frac{5}{2} \right)^2}\implies \boxed{BM\approx 2.549509756796392}[/tex]
AC must be the diameter of the circle.
What is Circle?
A circle is a closed two dimensional figure in which the set of all the points in the plane is equidistance from a center.
Given that;
A circle passes through points A(7, 4), B(10, 6), C(12, 3).
Now,
If AC is diameter of the circle then half the distance of AC is its radius and midpoint of AC is the center of the circle.
Since, B is also on the circle , then distance from B to the center must be same radius distance.
Midpoint of AC is calculated as;
= (7 + 12 / 2 , 4 + 3/2)
= (19/2 , 7/2)
= (9.5 , 3.5)
Now, Distance from A to the center and check the distance of B to the center as;
AM = √(9.5 - 7)² + (3.5 - 4)²
AM = 2.5495
And,
BM = √(9.5 - 7)² + (3.5 - 6)²
BM = 2.5495
So, Distance from A to the center and the distance of B to the center is same.
Thus, AC must be the diameter of the circle.
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A taxi cab charges $1.75 for the flat fee and $0.25 for each mile. Write an in equality to determine how many miles Eddie can travel if he has $15 to spend.
Answer:
.25x+1.75=15 and x=53
Step-by-step explanation:
first subtract 1.75 from both sides
then divide by .25 on both sides
and you will get x=53
Given f(x) and g(x) = f(k⋅x), use the graph to determine the value of k.
A. 5
B. [tex]\frac{1}{5}[/tex]
C. -[tex]\frac{1}{5}[/tex]
D. -5
Answer:
Option A k=5
Step-by-step explanation:
step 1
Find the equation of f(x)
we have the points
(-10,-6) and (0,4)
Find the slope m
[tex]m=(4+6)/(0+10)=1[/tex]
The function in slope intercept form is equal to
[tex]f(x)=mx+b[/tex]
we have
[tex]m=1[/tex]
[tex]b=4[/tex] -----> the point (0,4) is the y-intercept
substitute
[tex]f(x)=x+4[/tex]
step 2
Find the equation of g(x)
we have the points
(-2,-6) and (0,4)
Find the slope m
[tex]m=(4+6)/(0+2)=5[/tex]
The function in slope intercept form is equal to
[tex]g(x)=mx+b[/tex]
we have
[tex]m=5[/tex]
[tex]b=4[/tex] -----> the point (0,4) is the y-intercept
substitute
[tex]g(x)=5x+4[/tex]
step 3
Find the value of k
we have
[tex]f(x)=x+4[/tex]
[tex]g(x)=5x+4[/tex] -----> equation A
[tex]g(x)=f(kx)[/tex] -----> equation B
[tex]f(kx)=kx+4[/tex] ----> equation C
substitute equation A and equation C in equation B and solve for k
[tex]kx+4=5x+4[/tex]
[tex]kx-5x=0\\kx=5x\\k=5[/tex]
The value of k in the equation g(x) = f(k*x), where g(x) and f(x) are graphs, signifies a horizontal compression, expansion, or reflection of the f(x) graph. It depends on the given graph to determine the exact value of k.
Explanation:Without the graphical representation, it's difficult to provide a definite value for k. However, understanding the relationship between f(x) and g(x) can help us make an educated guess. If g(x) is a horizontal compression of f(x) by a factor of k, then k is positive and larger than 1. If g(x) is a horizontal expansion of f(x), then k is positive and less than 1. If g(x) is a reflection of f(x) across the y-axis and has a horizontal compression or expansion, then k is negative. For example, if g(x) completes one cycle in a space where f(x) would complete 5 cycles, then k is 5. If g(x) completes 5 cycles in a space where f(x) would complete one cycle, then k equals 1/5.
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