Which number is a zero of the function hh? h(x)=x2+3x−18 that is x squared + 3x - 18

Solve the inequality and graph 6j - 7 < 5

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?