This is a question about negative numbers and I need help. Write a word problem that involves the operation

5 - 9.

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

When solving a logarithm equation, how do you find the missing variable ?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.