7. Given a right triangle as shown below, use a calculator to estimate the length of the
1 answer:
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Answer:
5(x+1) -2(y-3) = 0
Step-by-step explanation:
For a given line ax+by=c and point (h, k), a perpendicular line through the point can be written as ...
b(x-h) -a(y-k) = 0
A graphing calculator shows the point of intersection of the graphs of the two lines to be (x, y) = (-1, 3), so the line perpendicular to 2x+5y=5 through that point can be written ...
5(x+1) -2(y-3) = 0
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In the attached graph, the requested line is shown in black.
This is a composite. Another way to write them is f(g(x)). Take the function g(x) and stick it in for x in f(x). Like this: 
. But we aren't done cuz there's some simplifying there to do. 
and canceling out the 3's we get just a simple x as our answer. The choice is the last one above as your answer.