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1 answer:
In similar figures, the angle measures are the same but the side lengths are different. So in #4, x = 42. Since all the angles of a quadrilateral added up equal 360, then y is 360-90-90-42=138. For number 5, make sure you match up the sides correctly in your ratio: 
. You could cross multiply to get 4x=16, and x = 4, or you could just realize that reducing 4/8 will give you 2/4 and x = 4. Going back to the idea that in similar shapes corresponding angles are the same measure, x in #6 is 63
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Answer:
C.
Step-by-step explanation:
We want fg of x, so first we have to multiply f(x) times g(x).
We can cancel out an x from every term.
Let's rewind a little to get this into one of the answer choices.
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