Which expression is equivalent to (10 + 7r-r?) + (-6r2-18 + 5r)? F.)-7r2 + 2r + 8
G.)7r2 + 12r + 8
H.)-7r2 + 12r - 8
j.)7r2 + 2r - 8

Answer this question, only if you know the answer. 30 points and brainliest!

Reflect the point (7,0) across the y-axis

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?