2 less then 5 times a number

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?