Find value of x (triangle)
help, in a test !!

7x+8y=-18, 4x-9y=-3 solve the system of equations

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

Which function has the domain x> -11