In a race, 28 cyclists got a flat tire on their bikes. if it takes 2.5 minutes to repair each bicycle, how long did it take to repair all the bicycles?

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

Twelve less than a number is at most 20

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.