Verify if (5/3,-2/3) is a solution to the system of equations y=1/2x-3/2 and y=-x+1

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

Twelve less than a number is at most 20

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq