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Katyanochek1 [597]
3 years ago
8

If a + b = -6 and x + y + z = -2, what is 8a - 7x - 7z - 7y + 8b

Mathematics
1 answer:
Oxana [17]3 years ago
5 0

Answer:

-34

Step-by-step explanation:

a + b = -6

x + y + z = -2

We want 8a so multiply the first equation by 8

8( a + b) = -6*8

8a+8b = -48

We also want -7x so multiply the second equation by -7

-7(x + y + z) = -2*-7

-7x-7y-7z = 14

Add the two equations together

8a+8b = -48

-7x-7y-7z = 14

-------------------------

8a+8b-7x-7y-7z = -34

Rearranging the order

8a - 7x - 7z - 7y + 8b = -34

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What is the equation of a line that is parallel to y=47x−3 and passes through (14, 4)?
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Answer:

Step-by-step explanation:

The equation of a straight line can be represented in the slope-intercept form, y = mx + c

Where

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The equation of the given line is

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Comparing with the slope intercept equation, m = 47

If two lines are parallel, it means that they have equal slope. This means that the slope of the line passing through (14, 4) is 47

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4 = 658 + c

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The equation becomes

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