Write each expression in simplest form 1. 5x+4+9x, 2. 2+3d+d, 3. -3r+7-^-3r-^-12

Ill mark the brainliest if you me with the these three questions 7,8,9

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12

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?