Question

(1,-3);y+2=4(x-1) plz help the answer is y=4x-7 but i got y=4x-8 how

Answer 1

y + 2 = 4(x - 1) first distribute
y + 2 = 4x - 4 then subtract 2 from both sides
-2 -2
y = 4x - 8

Answer 2

slope= 2/3
y-intercept= -1

2. slope = -1/1
y-intercept= 4

Mark the y-intercept (the point that intersects with the y-axis) on the graph. Slope = the ratio of rise over run.
So on the first one you would go up 2 units from (0, -1) and then right 3 units and that would be another point (3, 1) on the line. Then draw a line through those two points.
On the next one you would go down 1 unit from (0, 4) and then right 1 unit and that would be another point (1, 5) on the line. Then draw a line through those two points.

Answer 3

yes but the answer from the text book is y=4x-7
is the textbook worng?

Answer 4

y -2/3x = -1
y -x = 4
--------------------
substitute y= 2/3x-1 in the second equation we get
2/3x-1 -x =4
2/3x-x = 5
x(2/3-1)=5
x(-1/3)=5
x= -5 *(3/1)
x= -15 substitute the value in y= 2/3x -1
we get y = 2/3 *(-15)-1
=-10 -1
y=-11
the both lines meet at (-15,-11)

Answer 5

did any of my stuff help u

Answer 6

it got me confused

Answer 7

wattt X_X

Answer 8

wat part

Answer 9

I don't see how they could have gotten y = 4x - 7 ...

Answer 10

who me

Answer 11

meeeee, you're work is confusing...
the question was, why does the text book say y=4x-7
when the person is getting y=4x-8

all I can come up with is that when you plug in the coordinate in the beginning (1,-3)
it proves true for the y=4x-7 --> (-3)=4(1)-7 -> -3=-3

Answer 12

oh