Question

what is the value of D for the simultaneous equation 3x-2y=6 and 2x+y=11


OPTIONS

A) 1 B) -1 C) 7 D) -7 ​

Answer 1

Step-by-step explanation:

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Answer 2

The value of D for the simultaneous equation 3x - 2y = 6 and 2x + y = 11 is 7

Given : The simultaneous equation 3x - 2y = 6 and 2x + y = 11

To find : The value of D is

A) 1

B) - 1

C) 7

D) - 7

Solution :

Step 1 of 2 :

Write down the given system of equations

Here the given simultaneous equation

3x - 2y = 6

2x + y = 11

Step 2 of 2 :

Find the value of D

Hence the required value of D

$\displaystyle = \begin{vmatrix} 3 & - 2 \\ 2 & \: \: \: 1\end{vmatrix}$

$\sf = (3 \times 1) - ( - 2 \times 2)$

$\sf = 3 + 4$

$\sf = 7$

Hence the correct option is C) 7

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