Aluminium + hydrochloric acid gives aluminium chloride + hydrogen

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp