Convert 7.7 km into miles if 16=1 mile ? show your work

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?