A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
FAN AND MEDAL***
anonymous
 one year ago
FAN AND MEDAL***

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Given the system of equations presented here: 4x + y = 4 2x + 7y = 28

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? A)Multiply the second equation by −1 to get −2x − 7y = −28 B)Multiply the second equation by −4 to get −8x − 28y = −112 C)Multiply the first equation by −7 to get −28x − 7y = −28 D)Multiply the first equation by −2 to get −8x − 2y = −8

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Astrophysics @DanJS

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1Have you done this thing before?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no, i think i posted but nobody answered ;/

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1You can multiply an entire equation through by a number and it will not change the line... you want to do that on one of the two, so when you add them together, one variable cancels out to zero

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1There is more than one way to do it, but by the choices, we will eliminate the y by multiplying the first equation through by a 7, so 7y + 7y = 0 4x + y = 4 2x + 7y = 28 28x  7y = 28 2x + 7y = 28  add together 26x = 0
Ask your own question
Sign UpFind 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
 Engagement 19 Mad Hatter
 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.