Simplify 10x + 7y + 32x - 15y please help!

For which pair of functions is (gof)(a)=|a|-2?

Can someone me do math because i am having a breakdown rn because i don’t get it

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.