Multiply the polynomials (a2 + 3a – 7) and (2a2 – a + 4). simplify the answer.

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

What is the equation of a line that passes through points (0, 4) and (-4,-8)?