Evaluate the expression for x = –1.
–48x² − 7x + 27

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years