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Mathematics 14 Online
OpenStudy (narissa):

a few more check please

OpenStudy (narissa):

OpenStudy (narissa):

@iGreen

OpenStudy (tkhunny):

Why are you showing no work at all from your own head? Show your work! Cut the object into manageable pieces. You'll be done in a moment.

OpenStudy (narissa):

2*5*12+2*12*7*5

OpenStudy (igreen):

? I get 960 from that

OpenStudy (narissa):

=120+168+70=358

OpenStudy (narissa):

now im confused

OpenStudy (narissa):

tell that tkhunny to come back that person does not like me i just want to know if its right

OpenStudy (igreen):

Okay, we can cut it into a rectangular prism and a cube. Rectangular Prism = 12 * 7 * 5 Cube = 5 Rectangular Prism: SA=2(wl+hl+hw) Cube: SA = 6a^2

OpenStudy (narissa):

im getting really confused now

OpenStudy (igreen):

Plug in what we know: \(\sf 2((5)(12) + (7)(12) + (7)(5)) + 6(5)^2\)

OpenStudy (igreen):

Can you simplify that?

OpenStudy (narissa):

1520

OpenStudy (narissa):

huh idk

OpenStudy (igreen):

No, check again.

OpenStudy (igreen):

5 * 12 = ? 7 * 12 = ? 7 * 5 = ?

OpenStudy (narissa):

60,84,35

OpenStudy (igreen):

Yes, so we have: \(\sf 2(60 + 84 + 35) + 6(5)^2\) Now simplify \(\sf 5^2\).

OpenStudy (narissa):

25

OpenStudy (narissa):

is it a

OpenStudy (igreen):

Yes, so we have: \(\sf 2(60 + 84 + 35) + 6(25)\) Add 60 + 84 + 35.

OpenStudy (narissa):

179

OpenStudy (narissa):

358+150=508

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