Simplify the following expression. (9x^2-2x+7)+(4x^2+7x+2)

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Identify the number as a rational or irrational.explain. 127

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document