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giovney
25.09.2019 •
Mathematics
Bcde is a parallelogram.
what is the measure of ∠bec?
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Ответ:
∠BEC=120-40=80
Ответ:
Step-by-step explanation:
We require 2 equations with the repeating numbers placed after the decimal point.
let x = 2.2151515... ( multiply both sides by 10 and 1000 )
10x = 22.1515.... → (1)
1000x = 2215.1515.... → (2)
Subtract (1) from (2) thus eliminating the repeating decimal
990x = 2193 ( divide both sides by 990 )
x =
= ![\frac{731}{330}](/tpl/images/1175/5765/bb3e3.png)
Thus
2.2151515..... =![\frac{731}{330}](/tpl/images/1175/5765/bb3e3.png)