Question

Solve the system of equations and enter the solution as an ordered pair.

4x - 4y + 7 = 15

8y = 2x + 14

Answer 1

is that right? no typos?

Answer 2

the heat is on....

Answer 3

4 -4 = 8
-2 8 = 14

according to the cramer rule, as if names were important we can do this:

y = (56+16)/(32+8)
= 72/40
= 9/5

x = (-56-64)/(8-32)
= (-7-8)/(1-4)
= -15/3
= -5

if i did it right

Answer 4

(56+16)/(32+8)
/8 /8
----------------
7+2 / 4+1
9/5

just chking something out with another personality lol

Answer 5

8(9)/5 = 2(-5) + 14

72/5 = -10 + 14

...... it looks peculiar whaich makes me think i forgot how to add someplace

Answer 6

4x -4y = 8
-2x+ 8y = 14

y = 56 + 16/ 32+8
y = 72/40
y = 9/5

-4y +4x = 8
8y -2x = 14

x = -56-64 / 8-32
x = -120 / -24
= 30 / 6
= 5

Answer 7

8y=2x+14
Divide by 2, and get:
4y=x+7

4x-4y+7=15
Plug in (x+7) instead of 4y below:
4x-(x+7)+7=15
3x=15
x=5

4y=x+7
4y=5+7=12
y=3

Answer 8

x=5
y=3

Answer 9

yeah, but what am i missing ... :)

cant practice my cramer if i keep missing it

Answer 10

cramer vs cramer ?

Answer 11

no soup for you!

Answer 12

I don't remember this cramer rule - looking it up now :)

Answer 13

1x -1y = 2
-1x+ 4y = 7

y = 7(1)- -1(2)/ 4(1)- -1(-1)
= 7 + 2 / 4 - 1
= 9/3 = 3

yep, i forgot how to add

Answer 14

its the determinate of the matrix dividing the alomst determinate of the other thing

Answer 15

x y
----
a b = m
c d = n

y = na-cm / ad-bc

x = nb - md / bc-ad

Answer 16

that's almost like cheating :)
yeah, it's starting to come back to me now.

Answer 17

almost; as long as you can remember how to add lol