Check the picture below.
and since a triangle has a sum of 180° for all interior angles.
A = 180 - 39.34 - 25
A = 115.66

make sure your calculator is in Degree mode.
Five divided by the difference of a number and 12 equals the quotiene of 10 and the sum of the number and five
The answer is 17/22 17/20 because of the fractions
The answer is c. 117 degrees