I believe the answer to your question is D
Step-by-step explanation:
3(x + 1)(x + 7) − (2x + 5)²
3(x² + 8x + 7) − (4x² + 20x + 25)
3x² + 24x + 21 − 4x² − 20x − 25
-x² + 4x − 4
-(x² − 4x + 4)
-(x − 2)²
A squared number is never negative (provided x is a real number), so -(x − 2)² is never positive.
Answer: 122 ft
<u>Step-by-step explanation:</u>
s = r Ф (Ф must be in radians)
Given: r = 50
Ф = 140°



Answer:
16 pi ft^2
Step-by-step explanation:
C = 2 * pi *r
4 pi = 2* pi *r
Divide each side by 2pi
4pi/2pi = 2pi r/2pi
2 = r
We can find the surface area
SA = 4 pi r^2
= 4 * pi * (2)^2
= 16 pi ft^2