Which is the next step in the following construction of a square

Y=21.95x+10 y=22.45x solve by substitution

Vertical angles must check all that apply

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?