What is the y-coordinate of the solution to the system of equations? y = 3x -1 x- y= - 9

2 answers:

4 0

$y=3x-1 \\
x-y=-9 \\ \\
\hbox{substitute 3x-1 for y in the 2nd equation:} \\
x-(3x-1)=-9 \\
x-3x+1=-9 \\
x-3x=-9-1 \\
-2x=-10 \\
x=\frac{-10}{-2} \\
x=5 \\ \\
y=3x-1=3 \times 5-1=15-1=14 \\ \\
(x,y)=(5,14)$

The y-coordinate is 14.

IgorC [24]4 years ago

3 0

Answer:

Step-by-step explanation: took quiz

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