Question

Can someone explain this to me?

Answer 1

?

Answer 2

@radar @Isaiah.Feynman

Answer 3

any ideas? @radar

Answer 4

Well i worked out the two systems and they do have the same solution System A is (2,1) and System B (2, 1)

Answer 5

So that leaves the first two options to consider.

Answer 6

I think its A :) am I right

Answer 7

"System B is obtained by adding the first equation of System A to 2 times the second equation of System A." :o

Answer 8

No, its the other one, note that the coefficient of the ist equation in system B is not equal to first plus twice second in System A

Answer 9

1 + 12 =13 not 19

Answer 10

but if you timed it by 2 they would cancel out as 4x - 4x = 0 ?

Answer 11

I was looking at the y coefficient.

Answer 12

Ohhh I get what you mean >.>

Answer 13

sorry >.<

Answer 14

Could you help me with 2 more please?

Answer 15

I think it is B........but I want you to be sure it is :)

Answer 16

Don't worry, I'll double check before I submit lol its 50 question >.>

Answer 17

Look at B and substitute the x and y values in all three points and see if they come out to 4.

Answer 18

k sec

Answer 19

They all equal 4 is it B

Answer 20

check

Answer 21

They satisfy that linear equation, good choice.

Answer 22

3x – 2y = 4

(0, –2), (2, 1), and (–2, –5)

3(0) -2(-2) = 4

4 = 4

3(2) -2(1)

6 -2 = 4

4 = 4

3(-2) -2(-5)

-6 + 10

4 = 4

So I think its B :)

Answer 23

You are thinking straight.

Answer 24

Huh?

Answer 25

You are correct.

Answer 26

Greg made 4 chairs and 3 tables. Greg only has enough plywood to make at most 15 chairs or tables total. Let x represent the number of more chairs and y represent the number of more tables that Greg can make. Which of the following graphs best represents the relationship between x and y?

Answer 27

Your graphs appear identical in both links.

Answer 28

I like the middle one for the following reasons:
1. It takes the same amount of plywood to make a table or a chair.
2. He has already used enough plywood for 7 units, this means he has enough plywood remaining to make 8 more units.

Don't you agree that the middle graph represents that he can make 8 chairs or 8 tables or different combinations that add up to 8.

Answer 29

Yea, that was my doubt :p

Answer 30

If you locate points on that line they add up to 8, (0,8),, (8,0), (6,2), (2,6) etc.

Answer 31

Good luck with these.

Answer 32

>.> tis was my doubt lol, seemed easy.