Answer: 52
Step-by-step explanation:
The two angles on the base in the triangle is 17 and 111 as the angles of straight line have to be 180 so 2x = 180 - 111 - 17 as the sum of all the angles in the triangle have to be 180
x = 52
First department can choose the pair (delegate,alternate) by 7*6 = 42 ways.
Second department can choose the pair (delegate,alternate) by 10*9 = 90 ways.
Third department can choose the pair (delegate,alternate) by 6*5 = 30 ways.
Since these selections are INDEPENDENT, the resulting choice can be done in 42*90*30=113400
The independent variable is the dollar and the dependent variable is the packages of pens