The x-intercept is the point where *Y* is zero.
So set y = 0 and solve:
0 = 400 - (4/5)x
Add 4/5x to both sides:
(4/5)x = 400
Multiply both sides by 5/4 to cancel:
x = (5/4)*400
x = 2000/4
x = 500
So the x-intercept is (500, 0)
2007-10-17 12:07:50
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answer #1
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answered by Puzzling 7
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So for this, solve y=0 for x:
0=400-4/5*x
-400=-4/5x
-2000=-4x
x=500
2007-10-17 12:07:47
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answer #2
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answered by Mr. me 2
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X intercept is when the line crosses the x axis, so you have the value y in the equation, and it is 0.
so:
0=400-(4/5)x
(4/5)x=400
(1/5)x=100
x=500
There ya go!
2007-10-17 12:07:33
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answer #3
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answered by Jackson L 2
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-400 = -4x/5
x = 400*5/4 = 500
2007-10-17 12:08:51
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answer #4
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answered by ironduke8159 7
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x=500
2007-10-17 12:07:02
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answer #5
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answered by drewdogg0117 1
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