Question

please help. iv'e tried but i cant get the answer. Medal rewarded

Answer 1

Choose the equivalent system of linear equations that will produce the same solution as the one given below.

A.) 6x + 2y = -6
3x - 4y = -18

B.) 12x + 4y = -12
15x = -30

C.) 8x + 4y = -4
14x = -10

D.) 6x - 8y = -36
-6y = -42

6x - y = -15
3y = 9

Answer 2

Well we can just solve the system given and plug in the results to the choices...so from

6x - y = -15
3y = 9

we see that y = 3 right? so

6x - 3 = -15
6x = -12
x = -2

so if x = -2 and y = 3

Plug those into each choice you have...and see which on provides a correct statement

Answer 3

opps i am so sorry i lettered the answer choices wrong its suppose to be: ( will it still be affected?)
Choose the equivalent system of linear equations that will produce the same solution as the one given below.

6x + 2y = -6
3x - 4y = -18

a.) 12x + 4y = -12
15x = -30

b.) 8x + 4y = -4
14x = -10

c.) 6x - 8y = -36
-6y = -42

d.) 6x - y = -15
3y = 9

Answer 4

@johnweldon1993

Answer 5

Well there are the same solutions...in this case

so solve THAT system

6x + 2y = -6
3x - 4y = -18

Solve that top equation for 'y'

2y = -6 - 6x
y = -3x - 3

Now substitute that into the second equation for 'y'

3x - 4y = -18
becomes

3x - 4(-3x - 3) = - 18

3x + 12x + 12 = - 18

15x = -30

x = -2

And if x = -2

6x + 2y = -6
becomes
6(-2) + 2y = -6

-12 + 2y = -6
2y = 6

y = 3

So if x = -2 and y = 3 plug THOSE into the other options and see which ones work

Answer 6

ok i got it form here thanks

Answer 7

No problem! :)