Question

What is the value of y in the solution to the following system of equations?

2x + y = −4
5x + 3y = −6

Answer 1

you can do elimination method
substitution
graphing
matrices
so which one is easy for u??? please let me know :)

Answer 2

um

Answer 3

so i guess i should select is that okay ??

Answer 4

oh I just got it using a graph, sorry for wasting ur time.

Answer 5

ohh okay so what is y ??

Answer 6

-1,-2

Answer 7

you probably wanna use substitution. it's the easiest for here.

2x+y=-4
5x+3y=-6

isolate y in the first equation.

y=-4-2x

plug that into the 2nd equation

5x+3(-4-2x)=-6

that is 5x-12-6x=-6

that equates to -x=6, which means x=-6.

to get y, plug back into first equation.

2(-6)+y=-4

-12+y=-4

add 12, y=8

Answer 8

okay, that makes a lot of sense more then the graph my brother tried to show me....

Answer 9

graphing is actually really easy if you know how to do it, but if you don't have that in handy...do it algebraically.

Answer 10

so x = -6 and y = 8 ?

Answer 11

yes.

Answer 12

thanks, you get a medal.

Answer 13

can you help with another one?

Answer 14

I'm sure @Nnesha will like to give it a try

Answer 15

okay

Answer 16

The graph of f(x) = (0.5)x is replaced by the graph of g(x) = (0.5)x - k. If g(x) is obtained by shifting f(x) down by 5 units, the value of k is

Answer 17

graphing method i don't how you did but its really easy
point where both lines intersect
i graphed it 4 u

Answer 18

thanks

Answer 19

\(\huge\color{blue}{my ~ pleasure }\)