Is -8+(-9) a negative integer or positive

Negative Integer

Step-by-step explanation:

-8 + (-9) can be rewritten as -8 - 9, which is -17.

Since -17 is a negative number, it is a negative integer

Hope this helps!

d. vertex

step-by-step explanation:

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