Find the inverse with respect to addition of 9

Work Shown:

Let x be the additive inverse of 9

This means it adds to 9 to get 0

x+9 = 0 which solves to x = -9 after subtracting 9 from both sides.

So -9+9 = 0 and 9+(-9) = 0.

-9.

Step-by-step explanation:

Because  9 + (-9) = 0.

look a the sides they are perpendicular

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450