Perform the following operation: y-x+z

Which math sentence can be used to determine if the triangle is a right triangle?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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