How many gallons of a 80% antifreeze solution must be mixed with 60 gallons of 10% antifreeze to get a mixture that is 70% antifreeze?

Find the sum to the equation 3+6+9+

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

Ill mark the brainliest if you me with the these three questions 7,8,9