Mathematics Middle School

A music store rents instruments to students at the local middle school. Each trumpet rents for $10 a month and each drum rents for $5 a month. The monthly income is $100 and the total number of kids who rent instruments is 12. Write and solve a system of equations to find the number of trumpets rented () and the number of drums rented (y).

Answers

Answer 1
12x5=10 that’s the answer
Answer 2
Equation- $100 = $10(x) + $5(y)
Solve- 8 trumpets and 4 drums
$100 = $10(8) + $5(4)
80 + 20
$100

Related Questions

what is the answer help im having a mental breakdown

Answers

So if the greatest common factor between 28 and 24 is 4, then you should have 4(7 + 6). If you don’t think it’s right:
4(7 + 6) = 4 x 13 = 52
28 + 24 = 52

*kiz*
4(7+6) cuz 4•7 is 28 and 4•6 is 24

i hope this helps :)

Two students are comparing scientific experiments to investigations. They came up with the following ideas.

Student A: Testing plant growth in different types of soils

Student B: Comparing the water level in a lake during different times of the year Which student gave an example of a scientific experiment? (5 points)

A: Student A because it requires experimental and control groups
B; Student B because it requires a hypothesis
C: Student A because it is preferably done in natural settings
D: Student B because it is preferably done across a long period of time

Answers

Answer:

A is the correct answer.

Step-by-step explanation:

In experiment we require a controlled variable which is the constant in example A that is the plant we intend to put into the soil. In example B there's no such thing as controlled variable, so we can't expect the position of the water level. the water level is so unpredictable since tides or tsunami might change the result.

Answer:

A

Step-by-step explanation:

Scientific experiments need to have an independent and a dependent variable. Scientists can manipulate the independent variable. A should be the correct answer because it mentions what I just said. All scientific experiments need to have a control and experimental group. Therefore, student A and the answer A are correct.

I wish you the best of luck :D

1) Label the axes with the correct variables. Write a title for the graph. Write appropriate labels
for each axis.
2) Plot the data pairs on the coordinate plane.
3) What is the scale for the x-axis? ____________________
4) What is the scale for the y-axis? ____________________

Answers

Answer:

4 and 6

Step-by-step explanation:

Daniel took 1 hour to drive from Town A, to Town B at an average speed of 70 km/h. Then he took 2 hours to drive from Town B to Town C at an average speed of 64 km/h. (a) Find the total distance traveled.




Please put the units after the answer.



(b) Find the average speed for the trip.

Answers

198 km was traveled totally
there’s your answer and the work!!

− 4 = − 3

Change the equation above into y=mx+b form

Answers

i think it’s y=-4x+-3

Answer:

y=-4x+-3

Step-by-step explanation:

Find the value of x. (6x + 4)(5x + 2)(12x-4)°​

Answers

the answer is x=3 hope to help

Math probability
Can you tell me how you got the answer please hurry

Answers

Experimental probability= number of times an event occurs/ total number of times

From the question we know that the dice was rolled 25 times and from the table we know that ‘5’ was rolled 3 times

So the answer is 3/25

The double dot plot shows the number of points scored by Sam and Daniel in 15 games. What is the difference between their medians?

Answers

Answer:

4.9

Step-by-step explanation:

The y-coordinate of the vertex of the function y = 2x^2-8x+c is 2. The value of c is...

No Links please

Answers

the value of c would be -2

PLEASE HURRY! ITS MATH

Clare has a 1/2 liter bottle full of water. A cone-shaped paper cup has a diameter of 10cm and a slant height of 13cm as Shown. Can she pour all the water into one paper cup, or will it overflow? Explain your reasoning

(The volume of the cone is 1/3πr^2 and 1/2 liter = 500 cubic centimeters.)

Answers

You have to do 10x13 then divide it by 90 cause it’s a right angle

PLEASE HELP ME I DON’T GET IT

Answers

To solve this all you have to do is multiply seven by the numerator. -3×7 = 21, so, -21/4 simplified would be -5 1/4. so D is correct.

Answer:

D) -5 1/4

Step-by-step explanation:

In this problem there is -3/4 foot change every year and you are trying to see how much changes over 7 years. That means you are multiply the 7 by -3/4. To do that you need to change the 7 into a fraction.

7= 7/1, now you are going to mulitpy the two fractions.

This line represents the numerators:     7 times -3= -21

This line represents the denominators: 1 times 4 =  4

Now that we know our fraction is -21/4 we simplify.

The simplest form you can get is -5 1/4.

I hope this helped, let me know if you have any questions!! :)

On Monday, it snowed 30 inches in 16 hours. On Thursday, it snowed 21 inches in 6 hours. On which day did it snow at a greater rate each hour? How much more per hour?

Answers

Answer:

It snowed more on thursday because

Step-by-step explanation:

you just basically divide 30 by 16           30/16 = 1.9 (simplified)

Then you divide 21 by 6                           21/6 = 3.5

Answer/ Explanation:

It snowed more on thursday because when you divide 30 by 16 you get 1.9 inches an hour, then I divided 21 by 6 you get 3.5 inches of snow an hour. So therefore on thursday it snowed more every hour.

(I don't care if you use my words for the explanation)

The rate of snow deposition on Thursday is 1.625 inches per hour more than that on Monday.

What is the rate of change?

Rate of change is defined as the change in value with rest to the time is called rate of change.

here,

The rate of snow deposition is given as,
Rate = amount of snow/time


On Monday, it snowed 30 inches in 16 hours.
Rate = 30 / 16 = 1.875 inch per hour

On Thursday, it snowed 21 inches in 6 hours.
Rate = 21 / 6 = 3.5 inch per hour

Difference in rate = 3.5 - 1.875
                           = 1.625 inches per hour

Thus, the rate of snow deposition on Thursday is 1.625 inches per hour more than that on Monday.

Learn more about the rate of change here:

https://brainly.com/question/13103052

#SPJ2


Math (proportions)… help :’)

Answers

The answer is actually C not D. When you solve the problem you will get 14/3. When you simplify it you get 4 2/3.

Tell whether ratios form a propotion
1/4; 3/12
54/10; 81/15
18/24; 15/20
someone help me pls:(

Answers

Answer: Ratios form a proportion if they are equal when cross-multiplied.

1/4 and 3/12

Cross-multiply these ratios to compare them: 1/4 * 12 = 3, 3/12 * 4 = 3.

So they are equal and form a proportion.

54/10; 81/15

Cross-multiply these ratios to compare them: 54/10 * 15 = 81, 81/15 * 10 = 54.

So they are equal and form a proportion.

18/24; 15/20

Cross-multiply these ratios to compare them: 18/24 * 20 = 15, 15/20 * 24 = 18.

So they are equal and form a proportion.

Hence, all the ratios mentioned above form a proportion.

Step-by-step explanation:

))))))))))))()(())))))))))))))

A basketball player made 40 out of 50 free throws in last week's games.

a) Find the player's free-throw
percentage. (I believe it's 80%)

b) If the player averages eight free throws
per game, how many of them should she expect to make?

Answers

Answer:

a) The player's free-throw percentage is 80%

b) If the player averages 8 free throws per game, she should expect to successfully make 6.4 or about 6.

Step-by-step explanation:

Make the percent (80%) a fraction, 80/100.

Since the total amount of throws she makes is 8, put 8 as the denominator (bottom of the fraction) and an x as the numerator (top of the fraction) since the amount of throws she will make is unknown.

Because 80/100 is her free throw percentage, it should be consistent with the 8 she throws each game. Due to that, the x/8 is equal to the 80/100.

With the equation 80/100 = x/8, multiply diaganolly and you should get 640/100x.

When you divide that, you get 6 40/100 or 6.4 free throws made per every 8 throws. Because you can't make 0.4 of a throw, you round therefore making it 6.

I hope this helps!!! :)

The player's free-throw percentage is 80%.The player should expect to make approximately 6 to 7 free throws per game.

a) To find the player's free-throw percentage, divide the number of successful free throws (40) by the total number of attempted free throws (50) and multiply by 100.

Free-throw percentage = (Successful free throws / Total attempted free throws) * 100

= (40 / 50) * 100

= 0.8 * 100

= 80%

Therefore, the player's free-throw percentage is 80%.

b) If the player averages eight free throws per game, we can use the free-throw percentage to determine the expected number of successful free throws.

Expected successful free throws = (Free-throw percentage / 100) * Number of attempts

Number of attempts = 8 (since the player averages eight free throws per game)

Expected successful free throws = (80 / 100) * 8

= 0.8 * 8

= 6.4

Therefore, the player should expect to make approximately 6 to 7 free throws per game.

To know more about percentage here

https://brainly.com/question/24877689

#SPJ2

Using a pulley system, a crew does 7,500 J of work to load a box that requires 4,500 J of work. What is the efficiency of the pulley system?

Answers

Answer:

3,000

Step-by-step explanation:

Dont need the math just the answers!

Answers

good luck !!!!!!!!!!;$:$:&33

I am in need of assistance

Answers

Answer:

15

Step-by-step explanation:

15..............................

*CHALLENGE* 40 POINTS!!!

Answers

Answer:

16

Step-by-step explanation:

The anwser is 16 have a great day

14m + 5i - 6s + 7s - 8i + 11s - 9s - 4i + 10p - 3p + 5i

There are (fill in the blank) total terms in the expression above.

Answers

Answer: What type of problem is this lol

Step-by-step explanation:

the answer is 1,056si

Drag the correct steps into order to solve the equation −4+12=−4 for x

Answers

Answer:

Step 1: 4x = -16

Step 2: x = -4

Step-by-step explanation:

Subtracting 12 on both sides, and dividing by 4 will isolate "x" to solve the two-step equations, as we are performing opposite operations to the variable "x".

should be 4x=-16, X=-4

Plz help and explain I’ll give brainliest!

Answers

1) The full adult weight of puppy A will be 32 lbs.
2) 10.6664 should be the adult weight of puppy B.

Sorry if I got the second or first wrong!

Answer:

#1 32 pounds

#2 10.67 pounds

Step-by-step explanation:

#1

25% is 1/4 of the puppy

and 100% is 4/4

so you have to do 8 x 4 = 32 pounds

#2

75% is 3/4 of the puppy adult size

8 x 100/ 75

8x4/3

32/3

10.67 pounds

Diana rolls a regular dice, what is the chance that she will roll a 4?

Answers

Answer: 1/6

Explanation: There are six sides on a regular dice, and only one of the sides has a four.

guessing it’s a 6 sided dice, so it will be a 1 in 6 chance (1/6) that you’ll get a 4, hope this helps!

To make iced coffee, Sara puts her hot coffee into a refrigerator when it’s temperature is at 130 ℉ . The temperature of the coffee drops 4 ½ ℉ each hour. What is the temperature of the coffee after 5 hours?

PLEASE HELP I’M CONFUSED

Answers

To solve this all you need to do is multiply 4 1/2 x 5 and then subtract the Sun by 130°F. So 4 1/2×5 equals 22.5. 130-22.5=107.5. so the temperature of the coffee after five hours is 107.5°F.
If the coffee starts a 130 degrees and it cools if 4 1/2 degrees an hour and is in the fridge for 5 hours so 5 X 4 1/2 and that equals 22 1/2 so you would subtract 130 by 22 1/2 which would equal 107 1/2 degrees or 107.5 degrees

Can someone please ell me the answer to this, please? :)

Answers

Answer:

- 328 / 9

Step-by-step explanation:

- 36 + ( - 4 / 9 )

= - 36 - ( 4 / 9 )

= - 36 ( 9 / 9 ) - 4 / 9

= ( - 36 x 9 ) / 9 - ( 4 / 9 )

= ( - 324 / 9 ) - ( 4 / 9 )

= ( - 324 - 4 ) / 9

= - 328 / 9

Garth sells baseball caps outside the stadium. The graph shows the number of caps sold and the income from the sales. It represents a linear function.

Which statement best describes Garth's income from selling these caps?

A. He gets $5.00 per cap.
B. He gets $25.00 per cap.
C. He gets $34.00 per cap.
D. He gets $12.00 per cap.

Answers

he gets 12 per cap

100/8 = 12.50
the answer should be d

A four-part spinner is spun once.

spinner with four parts labeled W, X, Y, and Z

List the sample space for the experiment.

S = {X, Y, Z}
S = {W, Z, Z}
S = {W, Y, Y, Z}
S = {W, X, Y, Z}

Answers

Answer:

the probability of each letter to be chosen is 1/4%.

S= {W, X, Y, Z}

Step-by-step explanation:

Is probably the answer S={W,X,Y,Z}

The man is 6 feet tall. His shadow is 14 feet long. The tree's shadow is 49 feet long. Find the tree's height.

Answers

Answer:

21 ft

Step-by-step explanation:

Answer:

21 feet

Step-by-step explanation:

Please help me will give brainliest

Answers

D
All others are raised to an even power therefore will give you a positive number
But s and u raised to an odd power(3 and 1 respectively) therefore their product must be positive for the entire answers to be positive
d
i hope this helps :)

Please help meh no links and please give the right answer.

3. Tommy wraps sandwiches in a deli. A 12-inch sandwich takes 223 feet of paper to wrap. A 6-inch sandwich takes 113feet of paper to wrap. How much paper does Tommy use if he wraps one 12-inch sandwich and three 6-inch sandwiches?

Answers

Answer:

562 feet of paper

Step-by-step explanation:

multiply 113 by 3 and thats the amount of paper Tommy used to make three 6 inch sandwiches, then add 223. And thats the answer.

562 feet of paper is the answer to this question
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