A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
Choose the value of the y determinant (Dy) in the following system.
3x – y = 7
2x + 5y = 4
 2 years ago
Choose the value of the y determinant (Dy) in the following system. 3x – y = 7 2x + 5y = 4

This Question is Closed

exploringphysics
 2 years ago
Best ResponseYou've already chosen the best response.0what do you mean by y [dy] for the set of eq. ??

exploringphysics
 2 years ago
Best ResponseYou've already chosen the best response.0hey @FlyinSolo_424

FlyinSolo_424
 2 years ago
Best ResponseYou've already chosen the best response.0oh sorry. and like d (little y) instead of ^y it would be the other way

FlyinSolo_424
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1356062104599:dw

FlyinSolo_424
 2 years ago
Best ResponseYou've already chosen the best response.0@exploringphysics

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0list the coefficients without the \(y\) you get \[3,7\]\[2,4\] then \(D_y=3\times 47\times 2\) if i remember correctly

FlyinSolo_424
 2 years ago
Best ResponseYou've already chosen the best response.0im confused @satellite73

satellite73
 2 years ago
Best ResponseYou've already chosen the best response.0did you see how i got this \[3,7\]\[2,4\]?

exploringphysics
 2 years ago
Best ResponseYou've already chosen the best response.0[3 7] [2 4] id required one can you solve this ?

wio
 2 years ago
Best ResponseYou've already chosen the best response.1We start out with the system:\[ \begin{array}{cccc} 3x &–& y &=& 7 \\ 2x &+& 5y &=& 4 \end{array} \] We have our matrix by taking coefficients: \[ \begin{bmatrix} 3&1\\ 2&5 \end{bmatrix} \]We have our answer column: \[ \begin{bmatrix} 7\\4 \end{bmatrix} \]We replace the y column with the answer column:\[ \begin{bmatrix} 3&7\\ 2&4 \end{bmatrix} \]Then we find the determinant:\[ 3\times 4  7 \times 2 \]
Ask your own question
Ask a QuestionFind 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.