Reduce to simplest form.

-7/8 + (-1/2) =

Solve the system of equations. y= 2x y= x^2 - 15

Simplify the expression 10/11(22z) + (a+5) -1

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?