4x - y = -4
5x = 2y +1
how do I solve this using elimination?

x=-3, y=-8

Step-by-step explanation:

you will leave the first equation alone for now

the second, we will subtract 2y from both sides

5x-2y=1

now you system is

4x-y=-4

5x-2y=1

we will multiply the first equation with -2

-8x+2y=8

5x-2y=1

add both equations, we get -8x+5x=9,  -3x=9,  

x=-3

we will replace x with -3 in any equation, lets use 4x-y=-4,

-12-y= -4,         -y=12-4,                -y=8,         y=-8

b

step-by-step explanation:

the word superfluous means unnecessary

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b