A=1/2h(b+c)
times both sides by 2/1
2A=h(b+c)
divide both sides by h
=b+c
minus c from both sides
-c=b
times both sides by 2/1
2A=h(b+c)
divide both sides by h
minus c from both sides
Shley solved the exponential equation 3x+1 = 15 and her work is shown below. what is the first step she did incorrectly? step 1:
1 answer:
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If 
is the common difference between terms in the sequence 
, then
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(the sum of the first 16 terms in the sequence, presumably). Well, we know that
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So we get
...
You're told that
Recall that
so that we have
So we get
Answer:
x = 75
Step-by-step explanation:
Similar triangles are triangles which have the same shape but not the same size. This means their angle measures are equal but their side lengths are not instead they are proportional. To solve, we will set up a proportion and solve.
A proportion is two equal ratios set equal to each other. We form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). Out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:
.
To solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.