Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

nursesweetc Group Title

Solve using the elimination method... 11x + 10y = 147 0x + 2y = 14

  • one year ago
  • one year ago

  • This Question is Closed
  1. araffi Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    \[11x+10y=147\] \[0x+2y=14\] What you want to look for is a way to make the coefficients of either x or y the same (in absolute value). That way when you add or subtract the two equations, you will get a coefficient of 0 for that variable, which will allow you to solve for the other variable. The best way to do start is to find a variable where the coefficient in one equation is the multiple of another. In this case, 2-> one of the coefficients of y, multiplied by 5 = 10, the other coefficient of y. In order to keep the second equation true, you need to multiply both sides of the equation by 5. So the second equation becomes \[0x*5+2y*5=14*5\] OR \[0x+10y=70\] Subtracting the second equation from the first, you get 11x+0y=77 solving for x, x=77/11, so x=7, and plugging back into the original equation (or really just solving the second equation for y), you find that y is 7 also. [Hmmm, bizarre, is anyone else getting this answer?]

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.