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valentinak56 [21]
3 years ago
13

16x-10y=10 -18x-6y=6 solve it using the elimination method

Mathematics
1 answer:
Scrat [10]3 years ago
8 0
16x-10y=10
-18x-6y=6
either get x or y as opposites
48x-30y=30
90x+30y=-30
eliminate
138x=0
x=0
sub x in either equation
0-10y=-10 or 0-6y=6
y=1

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If the dimensions of a rectangular prism are 39 mm × 12 mm × 15 mm, then what is the surface area
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Answer:

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Step-by-step explanation:

The formula of a Surface Area of a rectangular prisms:

SA=2(lw+lh+wh)

<em>l</em><em> - length</em>

<em>w</em><em> - width</em>

<em>h</em><em> - height</em>

<em />

We have:

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Substitute:

SA=2\bigg((39)(12)+(39)(15)+(12)(15)\bigg)\\\\SA=2(468+585+180)\\\\SA=2(1233)\\\\SA=2466\ (mm^2)

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