Question

A system Of Linear Equations is shown below
4x+3y =8
y=2x+3
What is the value of y in the solution?
A. -1/10
B. -16/5
C.14/5
D.1/10

Answer 1

@suckerofmath is it B ?

Answer 2

@campbell_st

Answer 3

Sub B in your Y in the first equation and solve. Y=4x+3(-16/5)=8

Answer 4

It's not b ?

Answer 5

I don't know. Give me a minute to solve

Answer 6

Oh ty sorry

Answer 7

I would say B. It seams to work

Answer 8

ok ty I have 6 more to go and I'm done with all my Easter vacation HW finally

Answer 9

Not quite...

Answer 10

Wait nope I read the question wrong it's A

Answer 11

Sorry

Answer 12

Not quite correct again...

Answer 13

4x + 3y = 8
y = 2x + 3


We want to solve for 'y' ...so we need to solve that 1st equation for 'x'...and substitute that into the second equation ...

4x + 3y = 8
4x = 8 - 3y
x = (8 - 3y)/4

x = 2 - (3/4)y

Now substitute that into the second equation for 'x'

y = 2x + 3

becomes

y = 2(2 - (3/4)y) + 3

y = 4 - (6/4)y + 3

y = 7 - (3/2)y

y + (3/2)y = 7

(5/2)y = 7

5y = 14

y = 14/5

Answer 14

HUh

Answer 15

C wow we were wrong ...TY John. I'm John too

Answer 16

Just make sure never to accept answers straight out....try and work them out yourself