Thirty copies of a textbook weigh a total of 75 lb. What is the weigh of each book?

Write the standard equation of a circle with its center at the origin and radius 7.

Action movies make up 85% of Devon's movie collection. If he has 20 movies, how many action movies are in Devon's collection? Explain your reasoning.

Mr. o'brien is paid $7.30 per hour for the first 40 hours he works in a week. He is paid 1.5 times that rate for each hour after that. Last week, Mr. o'brien worked 44 hours. He says he earned $321.29 last week. Do you agree? Support your answer.

Give some examples of numbers that are greater than 1 or less than 0

What is two-fifths of three-sevenths?

What number is228% of 14.5

Which unit rate is the lowest price a. 6oz of chocolate chips for $2.49

Jim and Tom collected empty soda cans to raise money. Jim collected 70 cans Tom collected 700 cans the number of cans Tom collected is how many times greater than the number of cans Jim collected?

Graph the system. What is the solution and what does it represent

Solve x2 = 12x - 15 by completing the square. Which is the solution set of the equation? A ... (-6-square root of 51,-6 + square root of 51) B ... (-6 - square root of 21,-6 + square root of 21) C ...