Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

morganalana17

  • 2 years ago

hey i need help solving... 4a-2b+c=-24 a-b+c=13 9a+3b+c=9 can anyone help me with this

  • This Question is Closed
  1. Kaji
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Is this factoring?

  2. morganalana17
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no it wants me to solve it and turn it into a quadratic

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

    so you need the amount of the variables ?

  4. morganalana17
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

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

    4a-2b+c=-24-(1) a-b+c=13-(2) 9a+3b+c=9-(3) Let us eliminate c from equations (1) and (2). To do that subtract equation (2) from equation (1). (1)-(2)=> 4a-2b+c-(a-b+c)=24-13 4a-2b+c-a+b-c=11 3a-b=11-(4) Similarly let us eliminate c from equations (2) and (3). To do that subtract equation (2) from equation (3). (3)-(2)=> 9a+3b+c-(a-b+c)=9-13 9a+3b+c-a+b-c=-4 8a+4b=-4-(5) Nw take the equations (4) and (5). 3a-b=11-(4) 8a+4b=-4-(5) Let us eliminate b from both the equations. To do that we need to multiply equation (4) by 4. Then we will get (4)*4=> 4(3a-b)=4*11 12a-4b=44-(6) Nw add both equations (5) and (6) (5)+(6)=> 8a+4b+12a-4b=-4+44 20a=40 Solve for a. Then plug in that value of a in 3a-b=11 to find b. Then plug in the values of a and b in a-b+c=13 to find c. Can u find them @morganalana17?

  6. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.