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Black_prince [1.1K]
3 years ago
5

Write a point-slope equation for the line that has slope 4 and passes through the point (11,7). Do not use parentheses on the y

side.
Mathematics
1 answer:
adelina 88 [10]3 years ago
6 0
\bf \begin{array}{ccccccccc}
&&x_1&&y_1\\
%  (a,b)
&&(~ 11 &,& 7~)
\end{array}
\\\\\\
% slope  = m
slope =  m\implies 4
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-7=4(x-11)
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g100num [7]

Answer:

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Step-by-step explanation:

Let Dev's age be x and Syd's age be y

Since Dev is 3 times older than Syd, we may write  

x

=

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y

Since the sum of their ages is 92, we may write  

x

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=

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and so Syd is 23 year old.

Back substituting we get Dev is 69 years old.

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