Question

what is the value of the y variable in the solution to the following system of equations?
5x + 4y = 1
4x + 3y =-1

Answer 1

-7
7
9
-9

Answer 2

the options

Answer 3

simultaneous equations:
http://www.bbc.co.uk/schools/gcsebitesize/maths/algebra/simultaneoushirev1.shtml

Answer 4

do you understand how they work?

Answer 5

@kelliegirl33 thats not in the options so idk

Answer 6

I messed up...let me do it again

Answer 7

5x + 4y = 1 -->(4)5x + 4y = 1
4x + 3y = - 1-->(-5)4x + 3y = - 1
-----------------
20x + 16y = 4 (result of multiplying by 4)
-20x - 15y = 5 (result of multiplying by -5)
-----------------add
0 + y = 9
y = 9

Answer 8

thank you can you help me with another?

Answer 9

possible...let me see what you got

Answer 10

auditions for a play in New York were held with 120 men and women trying out for the lead singer position. if twice the number of men less three times the number of women id equal to 20, how many women auditioned?

Answer 11

m + w = 120 --> m = 120 - w
2m - 3w = 20
now sub 120 - w in for m
2(120 - w) - 3w = 20
240 - 2w - 3w = 20
240 - 5w = 20
240 - 20 = 5w
220 = 5w
220/5 = w
44 = w

44 women auditioned

You might need to get a second opinion because I am not sure if I got the second equation right.

Answer 12

@UnkleRhaukus ....is the second equation correct ?

Answer 13

The wording for the second equation is confusing me

Answer 14

@skullpatrol ...is the second equation correct ?

Answer 15

maybe somebody will come and check this

Answer 16

thats there as on option so i think its right

Answer 17

I wasn't sure if the second equation was 2m - 3w = 20 or 3w - 2m = 20 ?

Answer 18

@terenzreignz ....help please

Answer 19

you can "cheat"... or you can solve this normally, as if there were no choices...
what's your preferred method?

Answer 20

think you have interpreted the grama as i would have @kelliegirl33

Answer 21

If I use the other equation....the 3w - 2m = 20....the answer does not come out even, so I think my answer is correct