7. The height of a golf ball in meters x seconds after it has been hit is given by -4.9x2 + 42x. When does the ball hit the ground?
2.14 seconds
4.92 seconds
9.3 seconds
8.57 seconds

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

1. perpendicular

2. parallel

3. perpendicular

x coordinate is none

step-by-step explanation: