A-3b=4;2a=6b-9

Answer by elimination, please help

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Ineed to know the answer to this algebra question.

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible