Y=-3x+6 and y=5x-2 for y

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?

What is the quotient of 3x^4+22x^3+37x^2-7x+10

Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2