Only the smartest person can help me! Did I do this correctly? Please explain why it's a yes or a no!!!

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Which line is parallel to the line that passes through the points (2, –5) and (–4, 1) a. y=-x+5 b. y=-2/3x+3 c. y=2/3x-2 d. y=x+5