Find the solution(s) to the following system of equations:
y = 5
y = 3x - 4
Write answer as an ordered pair(s). Separate by a comma if more than one solution.
what is the x ordered pair

- anonymous

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- DanJS

If y = A and y = B, then set A = B, solve for the X value

- DanJS

5 = 3x - 4

- anonymous

I got -1 ?

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## More answers

- DanJS

5 + 4 = 3x - 4 + 4
9 = 3x
x = 3
y = 5 is already given

- anonymous

the answer that I have is 3,5 but it's wrong

- DanJS

the point (3,5) is where the two lines intersect

- anonymous

I got 239?

- UsukiDoll

how is (3,5) wrong though? It does satisfy both equations

- anonymous

the y axis is right but the x axis isn't

- DanJS

are you trying to put this in a computer test

- UsukiDoll

could be mymathlab stuff ?!
that was horrible when I took Calculus II

- DanJS

you said you put 3,5 try (3,5)

- anonymous

I have in like that (3,5)

- UsukiDoll

some sites are so super sensitive even though you have the right answer.

- UsukiDoll

what site are you using @Aliypop ?

- anonymous

It's called Moodel

- anonymous

The y-coordinate is correct. Check the x again by graphing the system. thats the reply my teacher left

- UsukiDoll

omg..... that means we have to use the graphing method

- UsukiDoll

I would put a side note....
yo man solving for x helps too ...there's more than one method to solve a problem as long as it doesn't break math rules geez.

- UsukiDoll

so I guess we have to graph y = 5 and y = 3x-4 -_-

- anonymous

okay

- UsukiDoll

so y = 5 means that our x is set at 0 so draw a horizontal line at (0,5)

- anonymous

okay

- UsukiDoll

and then for y = 3x-4 we have to let x be any number like x = 0,1,2,3 solve for y and plot points

- anonymous

ok

- UsukiDoll

that's about it.. if x = 3 there should be intersection... honestly... more than one method works... wow.

- UsukiDoll

I'm just peeved at what your teacher wrote like... dude come on

- anonymous

my teacher isn't the best I'm serious

- UsukiDoll

yeah it already shows smh

- anonymous

this is just a summer school class and I'm almost done I'm ahead of the class and she go upset about it

- UsukiDoll

LOL! XD

- UsukiDoll

what was her reason to be upset at you though?

- anonymous

because 1 I was far ahead of the class , I came from a online home school so I'm usually ahead of my classes anyways

- UsukiDoll

that's good.

- UsukiDoll

getting ahead is the best thing ever...even I got blasted for being ahead in my computer classes but I just didn't care about what my professors said.

- anonymous

but i'm going to public high school they want me to finish on pace with the rest, also is the answer 0,5

- UsukiDoll

hmmm... if we're going to use the graphing method we have to graph y = 5 which is a horizontal line. Since x isn't given, it's already 0. so we have a horizontal line at (0,5)
then for y=3x-4 we let x = 0,1,2,3... and solve for y to get points. we then use that information to graph until we find the point of intersection with is (3,5)

- UsukiDoll

it is supposed to be (3,5) that's the point of intersection.... but since it's the graphing method instead of substitution method then we graph 2 lines.

- UsukiDoll

did you graph y = 5 and y = 3x-4 ?

- anonymous

I had gotten -2

- UsukiDoll

oh were you solving for y =3x-4 by letting x = 0,1,2,3 ?

- anonymous

I got -3 with zero

- UsukiDoll

wait... for y = 3x-4 (just focus on that equation...nevermind the y =5)
if x = 0 then y = -4...so we have one point (0,-4)

- UsukiDoll

|dw:1437396892108:dw|

- UsukiDoll

I'll just graph y = 5 and we can solve y =3x-4 together so we got one point already which is (0,-4) |dw:1437396951979:dw|

- anonymous

so is it -4 ?

- UsukiDoll

yeah for y = 3x-4
x = 0
plug that in to the equation and we have y = -4

- UsukiDoll

now let's try x = 1
plug in x = 1 into y =3x-4
y =3(1)-4
can you solve further?

- anonymous

i got -1

- UsukiDoll

good so when x = 1, y = -1
another point (1,-1)|dw:1437397160711:dw|

- UsukiDoll

for y = 3x-4
let x = 2
so plugging x = 2 into the equation y =3x-4
we have
y=3(2)-4
and our y is ?

- anonymous

2

- UsukiDoll

yes so (2,2) another point |dw:1437397289276:dw|

- UsukiDoll

and we already solved when x = 3 |dw:1437397314401:dw|

- anonymous

so it would be (-3,5)?

- UsukiDoll

that drawing sucks by the way x(
it should be (3,5) the point of intersection which is the solution to those 2 equations

- UsukiDoll

##### 1 Attachment

- anonymous

so it's (0,5)

- UsukiDoll

(0,5) for y = 5 yes. It's just a horizontal line

- anonymous

thank you for helping me :D

- anonymous

oh wait XD sorry I read something wrong

- anonymous

we're still solving for x right ?

- UsukiDoll

I don't think so..
when we did y =3x-4 we let x be any number we choose until we find the point which draws the line further to intersecting the other line. In this case when our x =3, our y = 5
since we have a horizontal line y =5
that point (3,5) from y =3x-4 crossed the horizontal line y = 5

- UsukiDoll

as soon as we reach a certain x value that produces a point of intersection, we're done. If we have perpendicular lines (two lines that intersect) that means that there is one solution. 2 parallel lines means no solution.

- anonymous

so it is (0,5) I know i asked that a couple times I just wanted to make sure

- UsukiDoll

is that for graphing y = 5 only? then yes it's (0,5) on the x-axis it's 0.. so x = 0 and y = 5
at point (0,5) the horizontal line is drawn

- anonymous

okay

- anonymous

I have to submit the quiz so she can grade it yet again

- UsukiDoll

good luck.

- anonymous

thank you

- UsukiDoll

:)

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