Can someone help me pls

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.