x^2 - 81 = 0. Add 81 to each side.
x^2 = 81. Take the square root of each side.
x = 9, -9
Answer 400
Step-by-step explanation: 1 hours = 60 min
60 min divided by 9 = 6.66666667
6.66666667 * 5 dozen pretzels/ 60 pretzel = 400
did it pretty quickly may be wrong
1 gallon cost $15
1 quarts cost $4
1 quarts = 1/4 gallon
15x for number of gallon cans
2 cans at $4 each = $8
15x + 8 = 53
Subtract 8 from both sides:
15x = 53-8
15x = 45
Divide both sides by 15:
x = 45/15
x = 3
She bought 3 gallon cans of paint
Plus she bought 2 quart cans, which is equal to a half gallon.
She bought a total of 3.5 gallons of paint.
Answer:
Step-by-step explanation:
