Mathematics Middle School

Amelia experimented with 9 exercises from each class offered at her gym. Each class has an equal number of exercises.

Is this sample of the exercises at the gym likely to be representative?

Answers

Answer 1
Yes it is very good to representative.
Answer 2
Yes it is very good representive

Related Questions

Solve for volume please

Answers

Answer:

35.25

Step-by-step explanation:

brainly please

Answer:

V = 780yd

Step-by-step explanation:

We are given a rectangular prism with 3 different sides of numbers, then are asked to find the volume.

The volume of a rectangular prism is V = lwh

l = 20yd

w = 3.25yd

h = 12yd

All we need to do to find the volume is multiply all the number together :

V = 20yd * 3.25yd * 12yd

V = 65yd * 12yd

V = 780yd

Part A: Write an algebraic expression for 6 more than 7 times a number

Part B: Write a verbal expression for 3(n + 8).

Answers

Answer:

Part A: Equation 7n+6

Part B: The sum of three plus eight multiplied by a number.

Step-by-step explanation:

6 more= add 6

7 times a number

number=n

7n+6

sum= the result of adding two or more numbers

Answer:

Part A: Write an algebraic expression for 6 more than 7 times a number. 7n+6

Part B: Write a verbal expression for 3(n + 8).The sum of three plus eight multiplied by a number

Step-by-step explanation:

Find the areas of at least two of the triangles below. Show your reasoning.
help plzz

Answers

Answer:
A. Area = 8
B. Area = 15.5

Explanation:

Formula for Area of Triangles: b•h / 2

A.
height = 2.
base = 8.
2•8 = 16/2 = 8
Area = 8

B.
height = 3
base = 7
3•7 = 21/2 = 15.5
Area = 15.5

Write the phrase using numbers.
the product of a number (e) and 5

Number Form:
Expression or Equation:

Answers

Answer:

The Proper codes in Line a and Line b is given below

average=Sum/3  

print (" Average is = ", average)

Explanation:

In the given question it calculated the sum but the program does not calculate the average of the 3 numbers.The average of the 3 number is calculated by using average=Sum/3   statement so we add this code in Line a then After that print the value of average by using the print function so we add this code in Line b.

Step-by-step explanation:

The one above me is correct

Math math math math math obviously not my strong suit.

Answers

Answer:

1. is 22, 2. is 57, 3. is 60, 4. is x=15, 5. is x=14, 6. is x=84, 7. is x=60, 8. is x=-26, 9. is x=40, 10. is x=12

Answer:

1. is 22, 2. is 57, 3. is 60, 4. is x=15, 5. is x=14, 6. is x=84, 7. is x=60, 8. is x=-26, 9. is x=40, 10. is x=12

Step-by-step explanation:

you didn't even put your name my guy

!Help Help Help! lols

Answers

Answer:

Tricia travels at a rate of 50 miles per hour

Step-by-step explanation:

Answer:

75 miles per hour

Step-by-step explanation:

150 divided by 2 is 75

8. Please help me thanks

Answers

Answer:

D) 1800

Step-by-step explanation:

Answer:

1800

Step-by-step explanation: Because 10 x 180.

..........................................

Answers

Answer:

x=13

Step-by-step explanation:

mugs=x

key=y

x+y=21         8.5x2.75 =132.50

y=  -x+21

8.5x + 2.75 (-x + 21) = 132.50

8.5x - 2.75 + 57.75 = 132.50

5.75x = 74.75

x= 13

pls mark as brainliest

Answer:

he bought 13 coffee mugs and 8 key chains.

Step-by-step explanation:

How about we solve by simulataneousequation:

consider   coffee mug 'x' and key chain 'y'

there are total 21 items,

x+y = 21

=> x  = 21 - y .........................(i)

and

total cost is $132.50

8.5x + 2.75y = 132.5 .........(ii)

put value of x from eqn (i) into (ii):

8.5 ( 21 -y) + 2.75y = 132.50

=> 178.5 - 8.5y + 2.75y = 132.50

=> -5.75y = -46

 =>y = 8

Put vaklue of y back in (i):

x = 21 - y

=> x = 21 - 8 = 13

thus, x = 13

he bought 13 coffee mugs and 8 key chains.

Find the value of x
A. 11.67°
B. 42.5°
C.18°
D.20°

Answers

Answer:

D. 20°

Step-by-step explanation:

The entire angle = 90 degrees you can tell that from the corner indicator

Set the two expressions equal to 90

(3x+10) + (x) = 90

Combine like terms

4x + 10 = 90

Subtract 10 from both sides to cancel it out

4x = 80

Divide each side by 4

x = 20

Check it by substituting x for 20

3(20) + 10 = 70     x = 20     70 + 20 = 90

Answer:

D. 20degrees

Step-by-step explanation:

This is a Complementary Angle so it will equal 90.

3x + 10 + x = 90

4x + 10 = 90

90 - 10

= 80

4x = 80

80 / 4

x = 20

A radar measures the speed of a car at 45 miles per hour. The actual speed of the car is 40 miles per hour what is the percent error in the reading of the radar.

Answers

Answer:45

Step-by-step explanation:

answer: 11.11%

step-by-step explanation:
the radar was off by 5 miles per hour, so we need to find what percent 5 is out of 45. percent of (times) if you don’t know how to find that out.
make the assumption that 45 is 100% because it is the output.
next we represent the value we seek with x. so 100% = 45 and x% = 5.
this gives us the simple pair of equations 100% = 45(1) and x% = 5(2).
then multiplying the equations together like 100%/x% = 45/5.
make it into its reciprocal so x%/100% = 5/45. that comes out to be x= 11.11%
5 is 11.11% of 45 so the radar is off by 11.11%

please answer correctly brainliest if right

Answers

its 3,5,6 inch :) i got the same question late year

What is the median for the data shown below? Test Scores Stem Leaves 6 8 7 0 8 0, 6, 8, 8, 9 6, 6, 7, 7, 8, 8, 9 10 0, 0, 0, 0, 0 6|0 = 60 years old 100 97 92 32

Answers

Answer: I believe it would be 0.

Step-by-step explanation:

The median is 97.

Using the stem-and-leaf plot in the diagram, below, write out each data points given, which are:

68, 70, 80, 86, 88, 88, 96, 96, 97, 97, 98, 98, 99, 100, 100, 100, 100, 100

The line plot for these data would have the following frequency for each data point:

68 - 1 dot

70 - 1 dot

80 - 1 dot

86 1 dot

88 - 2 dots

96 - 2 dots

97 - 2 dots

98 - 2 dots

99 - 1 dot

100 - 5 dots

Range = 100 - 68 = 32

Median = 97

Therefore, the median is 97.

Learn more about line plot here:

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For each question, identify the population and a possible sample.

Answers

Answer:

1 The number of people who bought the book.  A best-seller list from the 1990s

2 The entire US.  List of new cars bought between the given time points

3 The poplulation of North America that`s teachers.   A Random sample of teachers incomes from different places inside North America.

4 A group of Tasmanian Devils.   A few Tasmanian devils in a controlled environment

Hope this helps

Sorry about the x on 1 of the answers but can someone help?

Answers

Answer:

a line

Step-by-step explanation:

A line goes on forever in both directions. That is why it is represented by a line segment with arrowheads on both ends.

Your answer: A line :)

A teacher surveys a sample of students from Lake Middle School. He asks the students where they’d like to go for a field trip. He records these results:

80 choose the aquarium.
60 choose the science center.
30 choose the planetarium.
40 choose the farm.
The teacher wants to figure out the relative frequency of a student choosing the aquarium. He will then estimate how many students out of all 1000 at the school are likely to choose the aquarium.

Answer the questions to solve the problem.

1. How many students did the teacher survey?


Write your answer in the space below.















2. What is the relative frequency of a student choosing the aquarium? Give your answer as a decimal rounded to the nearest hundredth. Show your work.


Write your answer in the space below.















3. Suppose the teacher surveys one student at random. Based on the survey results, what is the estimated probability that the student chooses the aquarium?


Write your answer in the space below.















4) Write and solve a proportion that the teacher can use to estimate how many students in the whole school would choose the aquarium. Show your work.


Write your answer in the space below.

Answers

Answer:

1 is 210

Step-by-step explanation:

i got he answer by adding the 4 things up

Answer:

210 student's

Step-by-step explanation:

80 students chose the aquarium.

60 students chose the science center.

30 students chose the planetarium.

40 students chose the farm.

The students can't vote for more than one place, so you just add all the numbers together.

80 + 60 + 30 + 40 = 210 students

Step-by-step explanation:

Marc runs 24 miles in 6 hours. At that rate, how many miles would he run in 4 hours?

Answers

Answer:
16 miles
Explanation:
Do a fraction:
24 miles / 6 hours = x miles / 4 hours
Cross multiple (24)(4) and (6)(x) to give you 96 = 6x and divide by 6 on both sides to isolate x and you get 16 = x

Answer:

The answer is 16 miles

Step-by-step explanation:

.......

I got two questions I need help with

Answers

need a picture to give you answers

name at least two independent variables that could result in a change in a monthly electric bill
ill give thanks and brainliest ;-;
(please i had to repost since a bot answered my last questions, waste of my 20 points

Answers

Answer: There are often not more than one or two independent variables tested in an experiment, otherwise it is difficult to determine the influence of each upon the final results. There may be several dependent variables, because manipulating the independent variable can influence many different things.

Two independent variables that could result in a change in the monthly electricity bill are: Physical size of products and Skill level of operators of machines.

Independent Variables

Independent variables are the determining factors that influence how a dependent variable changes.

For example, monthly electricity bill is a dependent variable which is dependent on the following:

Physical size of productsSkill level of operators of machines.Non-production machines utilizing electricity among others.

Therefore, two independent variables that could result in a change in the monthly electricity bill are: Physical size of products and Skill level of operators of machines.

Learn more about independent variable on:

https://brainly.com/question/25223322

PLEASE HELP FAST! What is the area of the figure?

Answers

Answer:

Step-by-step explanation: 119

Answer

The area of the figure is 119

Solve the system of equations: 6x/5 + y/5 = 2.3 x/10 − 2y/3 = 1.2

Answers

The answer is 32x+24y I think
(X,Y)= (266/123, -121/82)

Answer a and b and explain how you did it for 25 points and brainest. Answer has to be correct.

Answers

Answer:

Step-by-step explanation:

b. 2.5 inches. 20/8=2.5

a. 10.125  inches. 81/8 = 10.125

The answer for a) is 10.125 inch and b) is  2.5 inch, 1.875 inch

What is an inch?

Inch is a unit of linear measure equal to one twelfth of a foot (2.54 cm).

a) According to the question the real time length of the  court is 81 ft

But from the question 1 inch in diagram is equal to 8 ft

So, 81/8=10.125

Thus the entire length of the court if it is 81 ft in real life is 10.125 inch

b) According to the question the real time length and width of receiver A is 20ft and 15ft

So, in diagram it could be in

length is  20/8 = 2.5 inch

width is 15/8 = 1.875 inch

Thus the length and width of receiver A is 2.5 inch, 1.875 inch

To know more about inch click here

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help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

The answer is 14. Just cut them into 2. Which will be 2 rectangles.

Kylie installed a fence along the 500-foot perimeter of her rectangular backyard. She left an opening for a gate. In the diagram below, she used n to represent the length, in feet, of the gate. What is the value of n?
A. 5
B. 10
C. 20
D. 40

Answers

The correct answer is B.
the correct answe is B

Jack bought a motorbike. The original price was $1,300, but he got a discount of 20%. What was the discounted price of the bike?

Answers

Answer:

I believe it's $1,040.

Step-by-step explanation:

So, the original price is $1,300. If we subtract $1,300 by 20% the result should be $1,040.

Therefore, the discounted of the price would be $1,040.

PLEASE HELP!!!! 20 POINTS!!!

Answers

Answer:

14

Step-by-step explanation:

A biologist estimated that the current population of ladybugs in the region was 8.3 × 106. He predicts that a swarm of 950,000 ladybugs will be arriving into the region.

According to the biologist's estimates, how many ladybugs will be in the region after the swarm arrives?

A.
1.78 × 106

B.
9.25 × 107

C.
9.25 × 106

D.
1.78 × 107

Answers

Answer:    B

Step-by-step explanation:

If you are given the surface area of a square pyramid and the area of the base, how could you calculate the area of each side of the pyramid?

Answers

Answer:

you need to divide the surface are and the base and you should get the number of each lateral face

Step-by-step explanation:

but you do need to tell me the numbers so do that in the comments

y = 3x − 8
y = 9x − 11

Part A: Using your own words, explain how to solve the pair of equations graphically. Write the slope and y-intercept for each equation that you will plot on the graph to solve the equations.

Part B: What is the solution to the pair of equations?

Answers

Answer:

A. You would first plot the y intercept.  The first equation would be (0,-8) and the second equation is (0,-11).  Then you would plot the slope.  For the first equation, from (0,-8), you would move up 3 plots and right 1 plot.  For the second equation, from (0,-11), you would move up 9 plots and right 1 plot.

B. The solution to the pair of inequalities is (1/2, -13/2).  That is the intersection and point of the two lines.  You would need to graph the two lines (see part A answer) and then find the intersection.  

Hope this helps!

correct gets brainliest

Answers

Answer:

66.5m^3 closest value

Step-by-step explanation:

7*7=47 m^3 area of square

12-7=5m length of triangle side

(7*5)/2=17.5 m^3 area of triangle

area of square + area of triangle = total area

47+17.5 =64.5 m^3

Answer:

B; or 66.5 sq. meters:

Explanation:

- The figure is made of a Square and a Triangle:

Hope this helps!

Can u pls help :]
if u also answer the second one i wont be mad.. but u dont have to

Answers

Someone already answered but i’ll explain it.

For #1: The sum of all 3 angles in a triangle will be 180. So since one corner is a right angle, that’s 90. The other angle is 17. So 90 + 17 = 107. Then do 180 -107 to find the last number. Which is 73!
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