Given the function ƒ(x ) = 7x + 2, find x when ƒ(x ) = 31.
4
33/7
29/7

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

3x + 4y = 5 x- 3y = -7 solve by substitution

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?