Question

can sme on plzz help mee
Solve using substitution:
9y − x − 8 = 0
-3x + 7y = -16
Answer

(-8, 0)

(1, 1)

(0, 8/9)

(10, 2)

Answer 1

cn yu hlp me plzz alexeis_nicole

Answer 2

so is it asking you to chose one set of coordinate points that apply to both of the equations?

Answer 3

yes

Answer 4

okay so lets work with the first one.

Answer 5

okay

Answer 6

(-8,0) = (x,y)

so if we substitute the x value with -8 and the y with 0 in the first equation .... it'll look like this

9(0)-(-8)-8 = 0
0+8-8=0
0=0
So for this equation, the coordinate (-8,0) works

do you wanna try this coordinate for the next equation? :)

Answer 7

yes

Answer 8

okay do you knw how to do it?

Answer 9

I think I do

Answer 10

okay show me :)

Answer 11

you could just solve the system of equations with substitution by getting x by itself, then you would not have to go through every answer choice

Answer 12

-3x + 7y = -16
-3(0)+7(-8)-16
0-56-16
that's all I kn ii think its wrong

Answer 13

wait. you dont have to bring -16 to the other side.

-3(0) -56 = -16
0-56=-16
-56=-16
so although (-8,0) satisfies the first eqn it does not satisfy the second

Answer 14

-x = 8 - 9y (multiply by -1)
x = 9y - 8
now just sub 9y - 8 in for x in the other equation and solve for y. Once y is found, sub that back into the first equation and solve for x. You do not have to go through every answer choice.

Answer 15

okay can we do sme mre well if yu wnt to

Answer 16

or do what texaschic101 said

Answer 17

uhmm okay

Answer 18

well it's up to you whatever works, i dont mind going through every coordinate with you

Answer 19

Identify the system of inequalities that would generate the following graph:
Answer

y < 7x − 3; y > 3x − 2

y < 7x − 3; y ≥ 3x − 2

y > 3x − 7; y < 2x − 3

y < 3x − 7; y ≤ 2x − 3 want to kn hw to do this

Answer 20

where's the graph

Answer 21

?

Answer 22

I mean this
Select an ordered pair from the choices below that is a solution to the following system of inequalities:
3x < -3+ 2y
y − 2x > 4
Answer

(0, 4)

(-6, 0)

(0, 6)

(6, 3

Answer 23

?

Answer 24

okay... so substitute the y-values and x-values

Answer 25

do (0,6)

Answer 26

okay the same way we been doing it