Answer:

Step-by-step explanation:
Suppose we have a triangle WXY whose internal angles are:



The sum of the measures of the angles must be 180°, thus:

Simplifying:
15x + 15 = 180
Subtracting 15:
15x = 165
Dividing by 15:
x = 11
Thus, the measure of angle Y is


23,457 - 19,436 = 4,021
23,457 + 4,021 = 27,478
total income next year - 27,478
1% of 19,500= 195
6% = 1%x6 = 195x6 = 1170
19500+1170=20670