Please answer the following, thanks!1. Jamal has 1,240 songs on his MP3 player, and 40% of the songs are rock songs. How many of the songs are NOT rock songs?

2. Rianda bought 32 apples. She set aside 25% to eat and divided the rest equally among 6 pies. How many apples are in each pie?

3. The math class has a set of 40 calculators, and 85% of the calculators have working batteries. How many calculators need new batteries?

Answers

Answer 1

Answer: Number 1 is 744 because if you minus the percentage form the number of songs you get the 744

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At a school, 106students play at least one sport. This is 40% of the students at the school. How many students are at the school?

Answers

There are several information's of immense importance already given in the question. It is important to minutely check them before going for solving the problem.
Let us assume the number of students at the school = x
the total number of students playing at least one sports = 106
Percentage of students playing at least one sports = 40%
Then
40% * x = 106
(40/100) * x = 106
4x/10 = 106
4x = 106 * 10
4x = 1060
x = 1060/4
= 265
So there are 265 students at the school.

In 1 week there are 7 days how many weeks in 210 days

Answers

210/= 30 so the answer is 30

There are 30 weeks in 210 days. 210/7=30

What is the mean of the set of numbers
7,-9, 6, -10, -13, -5

Answers

Answer: -4, To get this answer Add up all of the numbers, then divide by how many numbers there are

the answer is for the equation -4

The product of 2 numbers is 20. Their difference is 8. What are the two numbers?

Answers

Answer:

the value of x is 10 and y is 2

Step-by-step explanation:

$(x)(y) = 20 \: \: \: \: ..(1) \n x - y = 8 \: \: \: \: \: ..(2) \n x = 8 + y \n (8 + y)(y) = 20 \n 8y + y {}^(2) = 20 \n y {}^(2) + 8y = 20 \n y {}^(2) + 8y - 20 = 0 \n y {}^(2) + 10y - 2y - 20 = 0 \n y(y + 10) - 2(y + 10) = 0 \n (y - 2)(y + 10) \n y - 2 = 0 \: \: \: \:o r \: \: y + 10 = 0 \n y = 2$