Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

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01-11-2017
Mathematics

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Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

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ChrisTrilling ChrisTrilling · Answer 1 · 2017-11-01T19:38:17+01:00

ChrisTrilling ChrisTrilling

01-11-2017

Ok, so here, we need to use the slope formula which is:

(y2 - y1)/(x2-x1)

y2 = 9
y1 = 5

x2 = x
x1 = 10

So:

(9-5)/(x-10) = -2

Now, we just solve for x,

9-5 = -2(x-10)

4 = -2x+20

2x = 16

x = 8

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Yuichan1122 Yuichan1122 · Answer 2 · 2017-11-02T15:26:54+01:00

Yuichan1122 Yuichan1122

02-11-2017

x=8 ....................

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