Scores on a college entrance exam rose from 20.9 in 1977 to 21.5 in 1986. what percent increase is this?

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Which expression will have the same sum as 3_8 + 1/4?

Which of the following is the inverse of y = 3∧x y = 1/3∧x y = ㏒3x y = (1/3) ∧x y = ㏒ 1/3∧x