What are the domain and range of the function fx) 3x+5

This is different from the first one can someone me

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52