Area of a triangle, base is 14cm and height is 8 cm

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9