Write the following equation in y=mx+b form : x- 2y= -8
2006-09-11 11:50:27 · 4 answers · asked by 123 1 in Science & Mathematics ➔ Mathematics
y = 1/2x + 4
2006-09-11 11:52:52 · answer #1 · answered by FlashGordon 3 · 0⤊ 0⤋
Well this is basically just asking you to get y by itself on one side, in its simplest form.
so:
x-2y= -8 Subtract x on both sides to get y by itself
x-2y= -8
-x...........-x
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-2y=-x-8 Now you have to divide both sides by -2, since "y" must be positive and have no numbers in front of it.
-2y/-2= -x/-2 -8/-2
your answer is y=1/2x + 4
-2y and -2 divided cancel y out to one so it is by itself.
-x and -2 divided is 1/2 because the negatives cancel out, and x is understood to be one so 1 over 2 is 1/2.
-8 and -2 is 4 because 8 divided by 4 is 2. (of course I know you know that) But it is +4, because the negatives cancel out to make it positive, and the equasion calls for a + or - y-intercept (the "m" in the problem) and since 4 is positive its sign goes along with it.
If it were 8 and -2 ir -8 and 3 the y intercpet would be "-4".
2006-09-11 12:05:26 · answer #2 · answered by gravytrain036 5 · 0⤊ 1⤋
x- 2y= -8
Subtract x both side
x-2y-x=-x-8
Cancel x in LS
-2y =-x-8
Divide by -1 both side
2y =x+8
Divide by 2 both side
y= (1/2)x +4
2006-09-11 11:58:44 · answer #3 · answered by Amar Soni 7 · 0⤊ 1⤋
u never gonna learn if someone does it for yu!!!!!!!
2006-09-11 11:54:30 · answer #4 · answered by N@NCY 3 · 0⤊ 1⤋