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Inessa [10]
3 years ago
13

Solve each system by multiplying. Check ur answer.

Mathematics
1 answer:
kondor19780726 [428]3 years ago
7 0
Multiply all terms in the first equation by 2 and all terms in the second by 3.
You should obtain:

6x + 16y = 34
-6x + 27y = 9
------------------
       43y =43, and so y = 1.  Subbing 1 for y in the first eq'n, we get

3x + 8(1) = 17, or 3x = 9, or x = 3.

The solution is (3, 1).
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what is the volume of a cylinder with height of 9 inches and the the radius is 1 inch. round to the nearest cubic inch
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Answer:

Step-by-step explanation:

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ruslelena [56]

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8 0
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Read 2 more answers
What's substitution for:<br> X=y-7<br> X+8y=2
MrRissso [65]
\left \{ {{x=y-7} \atop {x+8y=2}} \right. \\\\&#10;substitute\ x=y-7\ into \ the\ second\ equation\\\\&#10;y-7+8y=2\\\\&#10;9y-7=2\ \ \ | add\ 7\\\\&#10;9y=9\ \ \ | divide\ by\ 9\\\\&#10;y=1\\\\x=y-7=1-7=-6
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