Ineed the answers is really hard i have to solve each system of equation by graphing 5-13

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Which expression is equal to (21)(7)(3x) using the associative property? (21 · 7 · 3)x (7)(21)(3x) 32(7 + 3x) (3x)(7)(21)

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.