Answer:
Step-by-step explanation:
The one on the right it a 95 degree angle
Answer:

Step-by-step explanation:

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Answer:
The unknown number is 12.
Step-by-step explanation:
Let the unknown number be 'x'
Given:
A number increased by 5 is equivalent to twice the same number decreased by 7.
So, 'x' increased by 5 means add 5 to 'x'. This gives 
Now,
is equivalent to twice of 'x' decreased by 7.
Twice of 'x' means 2 times of 'x' which is 
'2x' decreased by 7 means subtract 7 from '2x'. This gives,

Now,
and
are equivalent meaning they are equal. So,

Therefore, the unknown number is 12.
2(3x5) + 2(3x9) + 2(5x9) = 174 in2
I believe this is correct answer