Subtract 28.9 − 9.25 =

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

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