Question

medal and fan

Answer 1

http://openstudy.com/code-of-conduct

Answer 2

it would be a lot easier if you posted one question at a time, but I'll try

Answer 3

okay hold on please

Answer 4

okay

Answer 5

question 1
Two lines, A and B, are represented by the equations given below:

Line A: 2x + 2y = 8
Line B: x + y = 4

Which statement is true about the solution to the set of equations?

It is (8, 4).
It is (4, 8).
There is no solution.
There are infinitely many solutions.

Answer 6

is that better?

Answer 7

☺

Answer 8

yes :)

Answer 9

okay, I know there's an easier way to solve it, but I've always been better with substitution. Do you know what that is?

Answer 10

it doesn't say

Answer 11

okay, well we can solve the second equation for y, so it would be y=4-x. you then would plug that in for y in the first equation and you'd have \(2x+2(4-x)=8\). do you see what I did?

Answer 12

sort of

Answer 13

what don't you get?

Answer 14

I don't know how to to do this very well so it is confusing to me how you get from y=4-x
too 2x+2(4−x)=8

Answer 15

are you still there

Answer 16

okay, you know how it was \(2x+2\color{red}y=8\). well, the other equations was \(\color{red}{y=4-x}\). so you plug it in for y.. and you get \(2x+2\color{red}{(4-x)}=8\)

Answer 17

does that make more sense?

Answer 18

yes!

Answer 19

okay. now just solve for x, do you know how?

Answer 20

not really

Answer 21

okay, you're going to want to first use the distributive property.. do you know how to do that? when you have \(2(4-x)\) you distribute the 2 to each of the terms. so you need to do \(2\times4\) and \(2\times-x\)

Answer 22

2x4=8 2x2=4

Answer 23

why'd you do \(2\times2\)?

Answer 24

oh sorry they cancel

Answer 25

is that right

Answer 26

hello

Answer 27

I'm here.

Answer 28

I'm still confused as to why you did 2*2..

Answer 29

k

Answer 30

i thought it was just multiplying but then i remembered that you have to cancel

Answer 31

one of them

Answer 32

after you distribute you should have \(2x+8-2x=8\)

Answer 33

oaky

Answer 34

okay

Answer 35

now can you solve that?

Answer 36

how

Answer 37

im really sorry i really have no idea how to do this

Answer 38

okay, well the first thing to do is combine like terms. what's \(2x-2x\)?

Answer 39

0 ?

Answer 40

yes, but for now, we're going to say \(0x\) so we don't get confused. and what's \(8-8\)?

Answer 41

0

Answer 42

yes, so you have \(0=0\) correct?

Answer 43

yup

Answer 44

so no solution

Answer 45

no, no solution would be if you had an answer that's undefined or something that was untrue, like 2=6

Answer 46

oh okay

Answer 47

so do you know what it is now?

Answer 48

infinite

Answer 49

Yep!

Answer 50

yeah!!! woooooh!!

Answer 51

can you help me with a few more please ☺

Answer 52

I'll try my best c: just open a new question

Answer 53

okay