can someone explain to me how to divide, multiply, add, and subtract fractions? im really du mb and have a learning disability :D soo y

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

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

What is the point slope form of a line with slope -5 that contains point (2,-1)