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Allisa [31]
3 years ago
10

X + 2y = 10 3x + 4y = 8 Which point is the solution to the system of equations?

Mathematics
1 answer:
bija089 [108]3 years ago
6 0

Answer:

x = -12

y = 11

Step-by-step explanation:

i used substitution and let 'x' = 10 - 2y

3(10 - 2y) + 4y = 8

30 - 6y + 4y = 8

30 -2y = 8

-2y = -22

y = 11

x + 2(11) = 10

x + 22 = 10

x = -12

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To solve the expression 7x + y we can substitute x with 2 and y with 6.

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Best of Luck!

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zzz [600]

Answer:

B.

Step-by-step explanation:

To simplify something that looks like \frac{\text{whatever}}{\sqrt{a}-\sqrt{b}} you would multiply the top and bottom by the conjugate of the bottom. So you multiply the top and bottom for this problem I just made by:

\sqrt{a}+\sqrt{b}.

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The conjugate of a+b is a-b.

These have a term for it because when you multiply them something special happens.  The middle terms cancel so you only have to really multiply the first terms and the last terms.

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I'm going to use foil:

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--------------------------Adding.

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