Earl gets a commission of 20% on all sales. he sold $2,580.00 worth of goods. what was the amount of his paycheck?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.