three sidewalks in a school yard form a triangle. explain the expression 1/2 (40)(30) represents the area inside three sidewalks

Let r = 3. what is the value of r + 58?

If 25% of y is 30, what is 60% of y?

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