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krok68 [10]
3 years ago
9

Find the value of x. 133 6 135 137° 139°

Mathematics
2 answers:
dmitriy555 [2]3 years ago
7 0

Answer: x + 92° + 47° + 82° = 360°       Add 92, 47, and 82 together

x + 221° = 360°       Subtract 221 on both sides to get "x" by itself

x + 221° - 221° = 360° - 221°

x = 139°     Your answer is the 4th option

saveliy_v [14]3 years ago
3 0

The sum of the angles of 4-sided shapes is 360°

To find the missing angle, you can do this:

x + 92° + 47° + 82° = 360°       Add 92, 47, and 82 together

x + 221° = 360°       Subtract 221 on both sides to get "x" by itself

x + 221° - 221° = 360° - 221°

x = 139°     Your answer is the 4th option

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Can someone help me with this?​
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Sum =  \frac{a( {r}^{n} - 1) }{(r - 1)}   \\

So,

\frac{a( {r}^{n} - 1)}{(r - 1)}  = 728 \\  \frac{2( {3}^{n} - 1) }{(3 - 1)}  = 728 \\  \frac{2( {3}^{n} - 1) }{2}  = 728 \\  {3}^{n}  - 1 = 728 \\ {3}^{n}=728+1\\ {3}^{n}  = 729 \\  {3}^{n}  =  {3}^{6}  \\ \boxed{ n = 6}

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