What math concepts are important in solving the problem

A change purse contains an equal number of pennies, nickels, and dimes. the total value of the coins is $2.56. how many coins of each type does the purse contain?

The ratio of the number of sheep to the number of horses on a farm is 8:3. If there are 42 horses on the farm how many sheep are on the farm?

Find x if: 1. 125x^3=b^9 2.16x2=1

In the arithmetic sequence {-9,-4,1,6,11, ...}, what is the common difference?

If 1,000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in more than 40 minutes?

If Ivan has 2/3 hours in his MP3. Is there is more than or less than 60 minutes of jazz on Ivan MP3 player? Explain how you know

Jamal 5/6 of his homework. Margaret finished 3/4 of her homework and Steve finish 10/12 of his homework. Which students finish the same amount of homework?

How do you write the slope intercept form

Algebra 2 Substitutions x-9y=25 6x-5y=3

Math word problem. Mike paid $59.00 for a bike. He paid with FOUR bills. What were the bills? Tell me the denomination of each bill and how many were used. Make sure to explain to me how you know this and how it totals $59.00