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Solve. Show all of your work and explain your steps. You are painting the outside of a jewelry box, including the bottom. To find the surface area (S.A.) of the jewelry box, you can use the formula S.A. = 2wl + 21h + 2wh, where l is the length, w is the
width, and h is the height. What is the surface area of the jewelry box in terms of x?
(HELP PLEASE)​

Solve Show All Of Your Work And Explain Your Steps You Are Painting The Outside Of A Jewelry Box Including The Bottom To Find The Surface Area SA Of The Jewelry class=

Sagot :

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Answer:

S.A. = 10x^2 +38x +30

Step-by-step explanation:

Given:

L = 2x+5

W= x

H= x+3

Formula: S.A = 2wl + 2lh + 2wh  

Solution:

S.A. = 2 (x *(2x+5))  + 2 (2x+5)(x+3) + 2 (x *(x+3))

S.A. = 4x^2 +10x + 2(2x^2+11x+15) +2x^2 +6x

S.A. = 4x^2 +10x +4x^2 +22x +30 +2x^2 +6x  

S.A. = 10x^2+38x+30