Piano lessons cost $30 per lesson. Find ordered pairs that represent the total cost for x number of lessons. Check all that apply. 0 (-1,-30) 0 (0,30) O (1,30) O (1.5,50) (3,90)

Step-by-step explanation:

y = 30x

y = 30(1)= 30 (1, 30)

y = 30(3)= 90  (3, 90)

y = 30(-1) = -30  (-1, -30)

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d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: