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WITCHER [35]
4 years ago
12

What is the missing y-coordinate that would produce a slope of 3, if a line were drawn through the points left-parenthesis 4 com

ma 5 right-parenthesis and left-parenthesis 8 comma y right-parenthesis?
Mathematics
1 answer:
likoan [24]4 years ago
7 0
Since the slope of a line is \frac{y_{2}-y_{1}  }{ x_{2}-x_{1} }
And 2 points of the line are given, (4,5) and (8,y) we can substitute those values into our equation.

\frac{y-5}{8-4} =  \frac{y-5}{4}

Since the slope of the line is 3,
\frac{y-5}{4} = 3
Multiplying both sides by 4 would give us:

y-5=12
y=17

Therefore the missing y value equals 17.
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The formula for perimeter of a rectangle is given as;

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