4 years ago

What is the x-intercept of the line with this equation 1/3x+y=−15

Mathematics

1 answer:

serg [7]4 years ago

6 0

The x-intercept is -45.

Substitute 0 for y to find x-intercept

Substitute 0 for x to find y-intercept

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$\text{The slope-intercept form:}\ y=mx+b\\\\\text{m-a slope; b-a y-intercept}$

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$\text{We know, the line passes through the point}\ (-2;\ 8)\to x=-2;\ y=8\\\\\text{substitute the values of x and y to the equation of the line:}\\\\8=5(-2)+b\\\\8=-10+b\ \ \ |+10\\\\b=18$

$\text{Your answer:}\ y=5x+18$

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