Darryl spent $276 on books. math books cost $21 and English books cost $30. if he bought a total of 11 books how many of each kind did he buy?

About 39/50 of Earth's atmosphere is made up of nitrogen. about what percent of the atmosphere is not nitrogen

Kareem will spend at least $31 on gifts. So far, he has spent $19. What are the possible additional amounts he will spend? Use c for the additional amount (in dollars) kareem will spend. Write your answer as an inequality solved for c.

An exponential function has an

What is 20% of $8.60?

How many sides has an equiangular polygon if one of its exterior angles is 25 5/7?

Round 7304 to the nearest thousand

1.424 as a mixed fraction

What is the factor of 4x^2-25

Tim wraps presents at a local gift shop. If its takes 2.5 meters of wrapping paper per present, how many can Tim wrap is he has 50 meters of wrapping paper?

Solve for r in the scientific formula d=rt