So you would start with the square and do 18 times 18 which equals 324 then for the triangle it's base times height divided by two so 9 times 18 divided by 2 which equals 81 then you add the triangle plus the square and your final answer is
answer:405

ANSWER: ? = -21
P/s: ? = x < let ? is x >
ok done. Thank to me :>
The temperature would be -10 degrees
If my calculator is correct then your answer is -1106
You going to have to find the slope of the x intercepts