1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
riadik2000 [5.3K]
3 years ago
11

Marc has 45 CDs in his collection, and Corinna has 61. If Marc buys 4 new CDs each month and Corinna buys 2 new CDs each month,

after how many months will Marc and Corinna have the same number of CDs
Mathematics
1 answer:
FinnZ [79.3K]3 years ago
3 0

Answer:

8 months

Step-by-step explanation:

x=# of months

45+4x=2x+61

45+2x=61

2x=16

x=8

You might be interested in
Flying against the wind, an airplane travels 4000 kilometers in 5 hours. Flying with the wind, the same plane travels 5040 kilom
andriy [413]

Answer:the plane in still air is 904 km/h

the rate of the wind is 104 km/h

Step-by-step explanation:

Let x represent the rate or speed of the plane in still air.

Let y represent the rate or speed of the wind.

Flying against the wind, an airplane travels 4000 kilometers in 5 hours. This means that the total speed of the airplane would be (x - y) km/h

Distance = speed × time

Therefore

4000 = 5(x - y)

4000 = 5x - 5y - - - - - - - - -1

Flying with the wind, the same plane travels 5040 kilometers in 4 hours. This means that the total speed of the airplane would be (x + y) km/h. Therefore,

5040 = 4(x + y)

5040 = 4x + 4y - - - - - - - - - 2

Multiplying equation 1 by 4 and equation 2 by 5, it becomes

16000 = 20x - 20y

20160 = 20x + 20y

Subtracting, it becomes

- 4160 = - 40y

y = - 4160/-40

y = 104

Substituting y = 104 into equation 1, it becomes

4000 = 5x - 5 × 104

4000 = 5x - 520

5x = 4000 + 520

5x = 4520

x = 4520/5 = 904

7 0
3 years ago
What is the additive inverse of 16 5/7?<br> Α -16<br> B. -16 7/5<br> C. -16 5/7<br> D. 16 7/5
topjm [15]
The answer is letter C
5 0
2 years ago
Read 2 more answers
What is the volume of the sphere? Round your answer to the nearest tenth.
pentagon [3]

Answer:

2,144.7

Step-by-step explanation:

The formula for the volume of a sphere is V=4pi r^3/3. Lets apply this formula for your sphere. The radius is 8, so lets plug in 8 in our formula. 4pi 8^3/3. Now, lets solve. 4 times pi. What is pi? We usually think of pi as 3.14. 4x3.14 is 12.56. Now, lets do 8^3/3. 8 times 3 is 512, and divided by 3 is 170.67. Alright, now we have 12.56 times 170.67. That is 2144.7 rounded to the nearest tenth.

4 0
3 years ago
45 1/3 x 8 1/9 = m<br> m = ?<br> If you answer I will rate you 5 stars. Thank you!
Nastasia [14]

Answer:

367 19/27

Step-by-step explanation:

Use symbolab bruv, its easy.

7 0
2 years ago
let m be the number of months. write an expression to show the total amount deposited after m months.​
user100 [1]
Any more info?

Explanation:

N/A
7 0
3 years ago
Read 2 more answers
Other questions:
  • Fran has ''buy one get one free'' tickets to the comedy club. She is bringing 7 people, including herself. If the regular price
    7·1 answer
  • Simplify the following expression. (z^3)^4(q^3)^0
    11·1 answer
  • Please help a brother out! Thank you!
    10·1 answer
  • Barry orders a wallet for $12.99, a sweater for $20.99, and a watch for $66.49 from a mail-order catalog. He adds $12.06 for tax
    5·1 answer
  • 2) Mr. Riley dove off a cliff that was 30 feet above the surface of the water and descended a total of 100 feet. Which of the eq
    5·1 answer
  • Terance galloped 20 kilometers in 40 minutes. Then he trotted 6 kilometers in 120 minutes. By how much did his first rate exceed
    7·1 answer
  • Pls answer! this problem
    12·1 answer
  • 178·37−37·78 <br> Plz find in binary<br> If not able: Say no solution.
    5·1 answer
  • What is the rectangular cross hatch chart used for eye test called
    9·1 answer
  • Alberto's monthly income is $3,200.Part of Alberto's monthly budget is shown in the table. what percentage og Alberto's income i
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!