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MizukiIsEpik

Answer:

Hello! Mizuki here to help!

The correct answer for problem 9 is B.

The correct answer for problem 10 is also B.

Step-by-step explanation:

Sorry if the work I did is confusing, if you don't get what I did, just comment below and I'll try my best to answer your question!

problem 9 work:

3 x 4 + 5 x 8 + 4 x 8 + 3 x 8 =

12 + 40 + 32 + 24 =

108

problem 10 work:

17 x 24 + 8 x 15 + 15 x 24 + 8 x 24 =

408 + 120 + 360 + 192 =

1080

Hanamura

Answer:

9. 108 cm^2

10. 1,080 m^2

Step-by-step explanation:

9. 2(3x4) = 24/2 = 12 (for right triangles)

8x5 = 40 (base rectangle)

3x8 = 24 (left slanted side of prism)

4x8 = 32 (right slanted side of prism)

12 + 40 + 24 + 32 = 108

10. 2(8 x 15) = 240/2 = 120 (for right triangles)

24 x 15 = 360 (base rectangle)

24 x 17 = 408 (right slanted side of prism)

8 x 24 = 192 (left slanted side of prism)

120 + 360 + 408 + 192 = 1,080

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