For an equation 9-3x=21, the first step is
2 answers:
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Answer:
7 of the angles measure 144 degrees each and one angle measures 72 degrees
Step-by-step explanation:
Let
x -----> represent the measures of the seven same-size angles,
x/2 ----> represent the measure of the one that is "two times smaller."
we know that
The sum of internal angles of a polygon can be calculated as:
where
n is the number of sides of the polygon
In this case
n=8 (octagon)
substitute
so
The linear equation that represent this problem is
solve for x
so
therefore
7 of the angles measure 144 degrees each and one angle measures 72 degrees
For this case, the first thing we must do is define a variable.
We have then:
x: unknown number
Doing the multiplication we have:
From here, we clear the value of x.
We have then:
Therefore, we have:
Answer:
7 times 1/7 equals 1
We have then:
x: unknown number
Doing the multiplication we have:
From here, we clear the value of x.
We have then:
Therefore, we have:
Answer:
7 times 1/7 equals 1