Answer:
(x + 9)² = 36
Step-by-step explanation:
Given
x² + 18x + 57 = 12 ( subtract 57 from both sides )
x² + 18x = - 45
To complete the square
add ( half the coefficient of the x- term)² to both sides
x² + 2(9)x + 81 = - 45 + 81
(x + 9)² = 36
Assuming the possible digits are from 0-9, there are 10*9*8 possibilities which come out to 720
$2.89 Just do the cost divided by the gallons and round up.
Answer:
0
Step-by-step explanation:
