Which of these is an incorrect expression of a rational number? A
−42−6

B
1−19

C
0−27

D
−120

I believe it to be D

Step-by-step explanation:

because thats the only one different out of those four.

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.

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