An airplane left Atlanta with 20 empty seats. If the airplane was 75% full, what was the total number of seats on the airplane?
2 answers:
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Answer:
Jake's error in step 3
Step-by-step explanation:
we have
Complete the square
step 1
Group terms that contain the same variable, and move the constant to the opposite side of the equation
step 2
Complete the square. Remember to balance the equation by adding the same constants to each side
step 3
Rewrite as perfect squares
Jake's error in step 3
He placed 6 instead of 3 in the left side
step 4
take square root both sides
step 5
step 6
step 7
x=5 and x=1