Atabletop in the shape of a trapezoid has an area of 6550 cm² it's longer base measures 115 cm in the shorter base in 85 cm what is the height

What is the value of x when x + 7 = 21?

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?