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nyny679
09.11.2020 •
Mathematics
In the figure below, m angle a=3x+5;m angle b=5x-18 , and m angle c=7x-2 .
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Ответ:
∠a=44,∠b=47, ∠c=89
Step-by-step explanation:
we can note that
∠a+∠b+∠c=180
hence,
3x+5+5x-18+7x-2=180
therefore,
3x+5x+7x+5-18-2=180
15x-15=180
15x=180+15
15x=195
x=![\frac{195}{15}](/tpl/images/0879/4100/75b37.png)
then, x=13.
with this values we can find all the angles:
∠a=3x+5 ⇒∠a=3(13)+5⇒∠a=39+5⇒∠a=44
∠b=5x-18⇒∠b=5(13)-18⇒∠b=65-18⇒∠b=47
∠c=7x-2⇒∠c=7(13)-2⇒91-2⇒∠c=89
We can corroborate these result by adding them.
∠a+∠b+∠c=
44+47+89=180
Thats right !!
Ответ:
two people in an hour
Step-by-step explanation:
thats why I think that why no one is waiting