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OpenStudy (anonymous):
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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OpenStudy (anonymous):
Use the slope formula. \[m = \frac{y_1 - y_2}{x_1 - x_2} \implies -2 = \frac{9 - 5}{x - 10} \implies -2(x - 10) = 4\]Can yuo finish it up?
OpenStudy (anonymous):
-2x+20=4 ?
OpenStudy (anonymous):
Yes. Now what do you think you should do?
OpenStudy (anonymous):
-2x = -16 Can you solve for x now?
OpenStudy (anonymous):
=8 . thanks calcmathlete
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