The sum of 3x2 + x - 7 and x2 + 10 can be expressed as?
A. 4x4 + x - 3
B. 3x2 + x + 3
C. 3x4 + x - 3
D. 4x2 + x + 3

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?