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Bess [88]
3 years ago
12

2x - y = 5

Mathematics
2 answers:
goldfiish [28.3K]3 years ago
6 0
Im pretty sure that the answer it is A. 7
because if you subtract 2 from 7 you get 5
Lesechka [4]3 years ago
5 0

The two equations are,

1. 2 x- y=5

2. x + 3 y =7

To determine the y-determinant, we will evaluate

\begin{vmatrix} 2& 5\\  1& 7\end{vmatrix}\\\\\\=14-5=9\\\\ As,D= \begin{vmatrix} a& b\\  c& d\end{vmatrix}\\\\ D= a d - b c

Option (B)→ 9 is correct y-Determinant.

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QUESTION 1
bixtya [17]

Option 1

The equation of line in standard form passing through point (0, 5) is 5x – 9y = - 45

<u>Solution:</u>

Given that slope "m" = \frac{5}{9}

The lines passes through point (0, 5)

We have to write the equation of line in standard form

The standard form of an equation is Ax + By = C

Now first let use point slope form to find equation of line and then convert to standard form.

\begin{array}{l}{\text { The point slope form is } y-y_{1}=m\left(x-x_{1}\right)} \\\\ {\text { Here } m=\frac{5}{9} ; x_{1}=0 ; y_{1}=5}\end{array}

\rightarrow y-5=\frac{5}{9}(x-0)

Converting to standard form by rearranging terms,

9(y - 5) = 5(x – 0 )  

9y – 45 = 5x  

5x – 9y = - 45

Hence, the line equation is 5x – 9y = - 45, so option 1 is correct.

7 0
3 years ago
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Dafna11 [192]
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