Astep function h(x) is represented by y=-2[x]. which phrase best describes the range of the function h(x)? a. all real numbers b. all rational numbers c. all negative integers d. all even integers

its 4 because 2 times 2 is 4, if you double the number two you get four

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18