Answer: 10
Step-by-step explanation: We can just count the number of vertices in the star and each vertex makes an angle. There are ten vertices in a star and thus ten angles.
Step-by-step explanation:

Answer:
V = -48
Step-by-step explanation:
((-15 + v) / -3) = 21
(-15 + v) = -63
v = -63 + 15
v = -48
24ab+ab-7
=25ab-7
#maybe XD
3 minutes - 2 minutes = 1 minute
30 gallons - 12 gallons = 18 gallons
it is draining at 18 gallons per minute
equation would be: y = -18x