Question

I got (3,6) is that right?
Solve the system: y = 4x + 6 and 2x = y

Answer 1

nope. check the signs when you add subtract

Answer 2

Shoot. So its -3,-6

Answer 3

thats right !!

you can confirm this urself, by plugging in the values in the system of equations given

Answer 4

Oh thanks!!
I also got stuck on another one can i share it with you?

Answer 5

sure.. .

Answer 6

Solve the system: 3x – y = 28 and y = 14 – 2x

a. (-2.8, 8.4)
b. (2.8, -8.4)
c. (-8.4, 2.8)
d. (8.4, -2.8)

Answer 7

hmm where you got stuck ?

Answer 8

I plugged in the y equation in and i ended getting 32? i don't think thats even close.

Answer 9

3x – y = 28 -----------(1)

y = 14 – 2x ------------(2)

substitute y value from (2) in (1)

=>

3x - (14-2x) = 28

3x - 14 + 2x = 28

5x = 14

x = 14/5 = 2.8

Answer 10

So would that make y -8.4?

Answer 11

ok i made a mistake. let me redo...

Answer 12

Oh oh sure

Answer 13

3x – y = 28 -----------(1)

y = 14 – 2x ------------(2)

substitute y value from (2) in (1)

=>

3x - (14-2x) = 28

3x - 14 + 2x = 28

5x = 42

x = 42/5 = 8.4

Answer 14

So that would make y 2.8?

Answer 15

now plugin x = 8.4 in (2) and solve for y

y = 14 - 2*8.4 = -2.8

Answer 16

-2.8**

Answer 17

Thanks so much!!

Answer 18

yep!

Answer 19

np... yw :)