Answer:
500
Step-by-step explanation:
Given: P = 150 - T where P is passenger cars and T is trucks
10P = 7T ⇔ P = 
Plug in equation 2 into equation 1:
= 150 - T
Solving for T, we get 500
Okay, it's wrong because they forgot to do -2 times 3x.
The correct answer is

-2x-8
Hope i got is correct!
62,000 is reasonable (because of rounding)90*690=62,000
The most precise is 4.00 because that is equal to 10.16 cm and that is the most closes to an exact measurment.
The answer would be 54, because A= PQ over 2 = 9 x 12 over 2 = 54