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

david16

What is the solution of the system of equations? You can use any method. y = 3x + 7 y = x – 9 a. (–1, –10) b. (–17, –8) c. (4, 19) d. (–8, –17

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. Tyler1992
    Best Response
    You've already chosen the best response.
    Medals 0

    C. Just plug in the x and y values and see if its true or not.

    • 2 years ago
  2. Tyler1992
    Best Response
    You've already chosen the best response.
    Medals 0

    Here is a example \[-10 = 3(-1) + 7\]\[-10 = -3 + 7\] \[-10 \ne 4\] Therefore A is not the solution. Now you do this for the other three and thats how you find the solution.

    • 2 years ago
  3. gw2011
    Best Response
    You've already chosen the best response.
    Medals 0

    y=3x+7 y=x-9 -3x+y=7 -x+y=-9 Subtract this equation from the above one -2x=16 x=-8 Substitute this value into one of the equations to find y y=x-9 y=-8-9 y=-17 Therefore, the answer is (-8, -17)

    • 2 years 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.