Easy math, please don’t answer if you don’t know

Find the commission on a $590.00 sale if the commission is 15%.

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs