[Answer]

[Explanation]
4(x + 6) + 4(x - 5)
[Expand] 4(x + 6): 4x + 24
4x + 24 + 4(x - 5)
[Expand] 4(x - 5): 4x - 20
4x + 24 + 4x + 20
[Simplify] 4x + 24 + 4x - 20: 8x + 4
= 8x + 4
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Answer:
c
Step-by-step explanation:
2(2x+3y)
as 4x+6y
hope this helps and makes sense
Answer:
<u>417.4ft^2</u>
Step-by-step explanation:
Surface area of a cone = πr(r+√r²+h²)
r is the radius
h is the height
Substitute
Surface area of a cone = π(5)(5+√5²+21²)
Surface area of a cone = πr(5+√25+441)
Surface area of a cone = π(5)(5+21.59)
Surface area of a cone = 3.14*5*26.59
Surface area of a cone <u>= 417.4ft^2</u>
<u>Hence the surface area of the cone is 417.4ft^2</u>