Wednesday

July 23, 2014

July 23, 2014

Posted by **Kelley** on Sunday, December 20, 2009 at 7:20pm.

7x-3y=19

I am told that my answer is

wrong, can you help me

(1.24, -3.44)

- math -
**Reiny**, Sunday, December 20, 2009 at 7:27pmWhoever told you that you were wrong, copy this and show them

if x=1.24, y=-3.44

equation#1

LS = 5(1.24) + 5(-3.44)

= 6.2 - 17.2

= -11

= RS

equation #2

LS = 7(1.24) - 3(-3.44)

= 8.68 + 10.32

= 19

= RS

Trust yourself !!

- math -
**drwls**, Sunday, December 20, 2009 at 7:32pmMultiply both sides of the the last equation by 5/3, to give

11.667 x - 5y = 31.667

Add that to the first equation and you get

16.667x = 20.667

x = 1.24

y = (7x-19)/3 = -3.44

If that was your answer, rounded off to three significant figures, then you are correct.

**Related Questions**

math - i got the following wrong, but don't know what I did wrong- die rolled 30...

math - I was given a problem 9x --- 15x I was told to simplify, I got 3y -- 5 I ...

math - 3+2*3 to 4th power*5. my answer is 2025. I was told i was wrong, please ...

Biology!!! - The female mosquito is an effective vector for malaria. What makes ...

Stumped - 5x+5y=-11 7x-3y=19 I am told that my answer is wrong, can you help me...

algebra - Solve for s in this equation. Depreciation. D=C-s/n This is my answer ...

Physics - In the Bohr model of the hydrogen atom, the speed of the electron is ...

stat - ok there was a question that my teacher told me i got wrong the question ...

Chemistry - Need help solving this problem. A 0.188g sample of unknown metal, X...

Math - Hi, I am getting very frustrated. I am doing an online homework for ...