For every $20 you earn, you donate $3 to charity. The equation d=3/20 e models the relationship between the amount earned in the dollars and the amount donated in dollars. Determine the amount you earned in dollars if you donated $90 to charity.

16 divided by 2 4/5 in simplest form

If the area of a square is 225 cm2, what is the length of the diagonal

Show or explain how to write 8,523 in expanded form using 15 hundreds

List five rational numbers which are smaller than 2

A video store offers two types of rental cars. Each rental card is good for six months. The gold rental card costs $25 plus $1.75/rental. The silver rental card cost $10 plus $3.25/rental. Explain why someone would prefer one card over the other.

Tony wants to purchase a baseball glove for $14.96, a baseball bat for $19.87, and a baseball for $5.37. He figured out that he will need $40.20 to purchase the three items. Estimate the cost of the three items.

Find the sum of the measures of the exterior angles of a 41-gon.

What is 9 minus 3 and 3 fifths?

A 9 gram sample of a substance that's used for drug research has a K value of 0.1459 Find the substances half-life in days, and round answer to the nearest ten. (exponential decay)

What is the value of 2 (x+x) - 2?