Question

The table below shows four systems of equations:

Which pair of systems will have the same solution?

Answer 1

cannot see the table.

Answer 2

System 1 System 2 System 3 System 4

4x − 5y = 2 4x-5y=2 4x - 5y =2 4x-5y=2

3x − y = 8 3x − 8y = 4 13x − 8y = 26 10x + 3y = 15

Answer 3

System 1 and system 3, because the second equation in system 3 is obtained by adding the first equation in system 1 to two times the second equation in system 1

System 2 and system 3, because the second equation in system 3 is obtained by adding the first equation in system 2 to two times the second equation in system 2.

System 2 and system 3, because the second equation in system 3 is obtained by adding the first equation in system 2 to three times the second equation in system 2.

System 1 and system 3, because the second equation in system 3 is obtained by adding the first equation in system 1 to three times the second equation in system 1.

Answer 4

mmm
I suggest solving systems 1, 2, and 3 first :)

Answer 5

how do I solve them

Answer 6

example please

Answer 7

like for system 4 (which you probably won't need since no options mentions it)
to solve it by elimination method
choose a variable and turn it to LCM like
4x - 5y = 2 --> 12x - 15y = 6
10x + 3y = 15--> 50x + 15y = 75
then add -----------------
so 62x + 0 = 81
62x = 81
then divide both sides by 62
so that x = 81/62

you would then plug it in to one of the original equations :)
10(81/62) + 3y = 15
810/62 + 3y = 15
3y = 15 - 810/62
y = 20/31
so the solution would be x = 81/62 and y = 20/31

Answer 8

erm... that's the method
but if you would like to save some time...
http://www.wolframalpha.com/input/?i=4x+%E2%88%92+5y+%3D+2%2C+3x+%E2%88%92+y+%3D+8+
http://www.wolframalpha.com/input/?i=4x-5y%3D2%2C+3x+%E2%88%92+8y+%3D+4
http://www.wolframalpha.com/input/?i=4x+-+5y+%3D2%2C+13x+%E2%88%92+8y+%3D+26

Answer 9

so the answer will be A

Answer 10

its out of A and D

Answer 11

3x - y = 8 --> multiply through by "3" --> 9x - 3y = 24
plus 4x - 5y = 2
does equal 13x − 8y = 26

Answer 12

therefore the second equation in system 3 is obtained by adding the first equation in system 1 to three times the second equation in system 1.

Answer 13

thank you can you help me with another its not so complicated like this one

Answer 14

sure :)

Answer 15

before I post it can you translate this word problem to number form
x the square root of the quantity x plus 7

Answer 16

x√(x+7)

Answer 17

now is the x just before the square root or on top of the small line on the line

Answer 18

on the left

Answer 19

to the left
because it did not say "x root" it said "square root"

Answer 20

you still there? I only have a few minutes left before I have to go :)

Answer 21

Which graph best represents the function y = x the square root of the quantity x plus 7

Answer 22

I tried to input the equation you put but the graph didn't look like these

Answer 23

then I'm guessing it was y = root (x+7)

parent graph was y = root (x)
http://www.ltcconline.net/greenl/courses/103a/keys/exam2PracticeExam/img21.jpg
how it moves is determined by
y = root (x - h) + k
(h, k) being the vertex
so for y = root (x - (-7))
^ you'll get (-7, 0) as the vertex

Answer 24

so its the second graph

Answer 25

wait nvrm the last one

Answer 26

yep :)

Answer 27

I don't want to be a burden but do you have time with another ill start new post so I csn give medal

Answer 28

It wouldn't be a burden, but I've really got to go, sorry :/
perhaps you can tag
esshotwired or inkyvoyd or SolomonZelman or shamil98
to help you with your question :)
just put at @ in front of their name to tag them
like @masterchief609 good luck!

Answer 29

ok thanks for all the help really appreciate it

Answer 30

you're welcome :)