Bobby has 3 times as many spaceships as his friend. Bobby has 21 spaceships. How many spaceships does his friend have?

Find the rate of commission if total sales are $3600 and the commission is $90

Anna wants to buy a house at $67,000. She will need at down payment of 15%. What is the down payment amount

28 is what percent of 56?

Find the least common denominator for these two rational expressions. x/x^2+2x+1 - 5/x^2+6x+5

How many edges does a triangular pyramid have

The temperature is changing every day by negative 7 over 18 degrees Fahrenheit. What will be the change in the temperature after 3 days?

The equation of the polynomial function is: f (x) = (x + (2 + i)) (x + (2 - i)) (x + 5) f (x) = (x - (2 + i)) (x - (2 - i)) (x - 5) f (x) = (x - (2 + i)) (x - (2 - i)) f (x) = (x + (2 + i)) (x - (2 - i)) (x - 5)

Andre owned a 1/4 acre lot. He wanted to construct a 120' x 80' tennis court on the lot. How many square feet will remain uncovered after he builds the tennis court?

Mary is paid 7.5% commission on all of her sales. She had sales of $2300 for the month of December. How much commission did Mary make?

What is the total weight in pounds of a 2.5 million blocks used to build the great pyramid and then convert that to ounces