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Andru [333]
2 years ago
11

Solve the system of equations - x - y = 6 and 5x -7y=66 by combining the equations

Mathematics
1 answer:
DIA [1.3K]2 years ago
7 0

Answer: Let's solve for x.

−x−y=6

Step 1: Add y to both sides.

−x−y+y=6+y

−x=y+6

Step 2: Divide both sides by -1.

−x

−1

=

y+6

−1

x=−y−6

Answer:

x=−y−6

Let's solve for x.

5x−7y=66

Step 1: Add 7y to both sides.

5x−7y+7y=66+7y

5x=7y+66

Step 2: Divide both sides by 5.

5x

5

=

7y+66

5

x=

7

5

y+

66

5

Answer:

x=

7

5

y+

66

5

Step-by-step explanation:

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<em>
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6 0
3 years ago
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Answer:

x = 19

Step-by-step explanation:

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3x = 180°-123°

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Which is the simplest radical form of √52?
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Remark
There are a number of ways to look at this. I'll pick the easiest.

Step one
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52 = 2 * 26
52 = 2 * 2 * 13. That's as far as you can go.

Rule
For every 2 equal prime factors, 1 of them can be taken out side of the root sign. The other one disappears.

sqrt(52) = sqrt(2*2* 13) = 2*sqrt(13)

Answer 2sqrt(13) <<<< answer
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