Question

PLZ PLZ PLZ HELP!!! MEDAL GIVEN!! How many solutions does the system of equations have??

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

Answer 1

So I know that you do: 2(4x + 3) - 8x = 3

Answer 2

Because you plug in the y from the second equation.

Answer 3

@mathman806

Answer 4

a. one
b. two
c. infinitely many
d. none

Answer 5

lets get the 2y-8x=3 into y=mx+b form
2y-8x=3
add 8x
2y=8x+3
divide by 2
y=4x+6
y=4x+3
they have the same slope but they don't have the same y-intercepts so it would be none

Answer 6

Ooohh. Wow thanks!! One more?

Answer 7

sure

Answer 8

How many solutions does the system of equations have?

x = -4y + 4 and 2x + 8y = 8

Answer 9

well lets get them both into y=mx+b
x=-4y+4 2x+8y=8
add 4y subtract 2x
x+4y=4 8y=-2x+8
saubtract x divide by 8
4y=4-x y=(-1/4)x+1
divide by 4
y=1-(1/4)x y=(-1/4)x+1
same slope and same y- intercepts so infinitely many

Answer 10

Wow your great help!! Thank you!!