1. x + 3
2. (5x)³ = 125x³
3.
Circumference = 2π(x+7)
= π(2x + 14)
4.
Total cost = 5(2x + 5) + 2(x - 7)
= 10x + 25 + 2x - 14
= 12x + 11
5.
Volume = (4)(a + 2)(a - 2)
= 4(a² - 2a + 2a - 4)
= 4(a² - 4)
= 4a² - 16
6.
Cost of chicken = 4(x² + 8x - 3)
= 4x² + 32x - 12
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Answers & Comments
1. x + 3
2. (5x)³ = 125x³
3.
Circumference = 2π(x+7)
= π(2x + 14)
4.
Total cost = 5(2x + 5) + 2(x - 7)
= 10x + 25 + 2x - 14
= 12x + 11
5.
Volume = (4)(a + 2)(a - 2)
= 4(a² - 2a + 2a - 4)
= 4(a² - 4)
= 4a² - 16
6.
Cost of chicken = 4(x² + 8x - 3)
= 4x² + 32x - 12