Answer:
1 hour and 17 minutes and 7 sec
Step-by-step explanation:
.
X + x + 1 + x + 2 = 12
x + x + x + 3 = 12
subtract 3 for each side
x + x + x = 9
3x = 9
divide 3 from each side
x = 3
Small side 3 feet
Middle side 4 feet
Long side 5 feet
The answer is B. :PPPPPPPPPP
Answer:
8x² + 8
Step-by-step explanation:
Given
(x² + 3)² - (x² - 1)² ← expand both factors using FOIL
= + 6x² + 9 - ( - 2x² + 1) ← distribute by - 1
= + 6x² + 9 - + 2x² - 1 ← collect like terms
= 8x² + 8
The answer is A. I looked it up for you on an surface area calculator.