Which expression is equivalent to -2.1 + (-5.9) + (-3.7)? a. (2.1 + 5.9 + 3.7) b. (2.1 + 5.9) + (-3.7) c. -2.1 - (5.9 + 3.7) d. -(2.1 - 5.9) + (-3.7) explain so i can understand.

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

Just tell me how to set up the equation.

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?