Which products result in a sum or difference of cubes? Check all that apply.
a3 + b3
=q3 – 63
(x - 1)(x2 + 4x – 16)
(x - 1)(x2 - x + 1)
(x - 1)(x2 + x + 1).
(x + 1)(x2 + x - 1)
(x + 4)(x2 - 4x + 16)
(x + 4)(x2 + 4x + 16)

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?