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3 years ago

For each ordered pair, determine whether it is a solution to the system of equations. y=6x-7 9x-2y=8

Mathematics

1 answer:

horrorfan [7]3 years ago

5 0

Answer:

x = 2, y = 5

Step-by-step explanation:

Hello,

y=6x-7

9x-2y=8

can be written as

(1) 6x - y = 7

(2) 9x -2y = 8

(2)-2*(1) gives

9x -2y -12x +2y = 8 - 2*7 = 8 - 14 = -6

<=> -3x=-6

<=> x = 6/3=2

and we replace it in (1)

y = 6*2-7=12-7=5

hope this helps

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SVETLANKA909090 [29]

$\huge \boxed{\mathbb{QUESTION} \downarrow}$

$\begin{bmatrix} \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \end{bmatrix} \begin{bmatrix} \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { - 1 } & { 1 } & { 5 } \end{array} \end{bmatrix}$

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Simplify each element by multiplying the individual terms.

$\left(\begin{matrix}4-3&3&6+15\\10-4&4&15+20\end{matrix}\right)$

Now, sum each element of the matrix.

$\large\boxed{\boxed{\left(\begin{matrix}1&3&21\\6&4&35\end{matrix}\right) }}$

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