Answer:
1
Step-by-step explanation:
I guessed on the problem and it was right
Answer:
60
Step-by-step explanation:
140 = 80 + z
z = 60
Use FOIL (First, Outside, Inside, Last)
x(x) = x²
x(9) = 9x
-2(x) = -2x
-2(9) = -18
x² + 9x - 2x - 18
simplify by combining like terms
x² + 9x - 2x - 18
x² + 7x - 18
x² + 7x - 18 is your answer
hope this helps