20/q = 7/9
20×9 = 7q
7q = 180
q = 180/7
Answer:
z = (2a-3b) = -1
Step-by-step explanation:
Subtract: 2 - 3 = -1
6)a
if we put n as the number of sides in a regular polygon, the formula to find the measure of each angle is

so the answer will be

they each measures 144 degrees
good luck