a. (-4, 0) (7,0)
b. (7,0) (-4,0)
c. (7,0) (0, -4)
d. (-7, 0) (0, 4)
2007-06-05 08:49:29 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
y intercept
X = 0
4x - 7y = 28
4(0) - 7y = 28
0 - 7y = 28
- 7y = 28
- 7y / - 7 = 28 / - 7
y = 28 / - 7
y = - 4
- - - - - - - - - -
x intercept
y = 0
4x - 7y = 28
4x - 7(0) = 28
4x - 0 = 28
4x = 28
4x / 4 = 28 / 4
x = 28 / 4
x = 7
- - - - - - - - - -s-
2007-06-05 09:05:58 · answer #1 · answered by SAMUEL D 7 · 2⤊ 0⤋
to find the intercepts you have to let y=0 and x=0
first let x=0
so you get -7y=28
the y=-28/7= -4 (0,-4)
then y=o
you get 4x=28
x=28/4=7 (7,0)
the answer is C.
2007-06-05 08:56:31 · answer #2 · answered by cafet 1 · 0⤊ 1⤋
c)
when y=0
4x-7(0) =28
x=7 so (7,0) x intercept
when x = 0
4(0) -7y=28
y = -4 so ( 0,-4) y intercept
2007-06-05 08:52:39 · answer #3 · answered by cute-goddess 5 · 0⤊ 1⤋
4x=28 ; y=0
x=7
-7y=28 ; x=0
y=-4
which means (7,0) and (0,-4) C
2007-06-05 08:58:42 · answer #4 · answered by Banna_skillz 2 · 0⤊ 1⤋
to find x
4x - (7x 0) = 28
4x = 28
x = 28
(4 x0) - 7x =28
- 7x = 28
x = -4
ans is C
2007-06-05 08:57:43 · answer #5 · answered by Anonymous · 0⤊ 0⤋