2007-10-17 12:03:11 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
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 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
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 · answer #2 · answered by Mr. me 2 · 0⤊ 0⤋
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 · answer #3 · answered by Jackson L 2 · 0⤊ 0⤋
-400 = -4x/5
x = 400*5/4 = 500
2007-10-17 12:08:51 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
x=500
2007-10-17 12:07:02 · answer #5 · answered by drewdogg0117 1 · 0⤊ 0⤋