Kona ice charges 4.50 for their large cup. Each refill on the cup cost $1.25. If Jason has 19.50, how many refills can he get before he runs out of money.

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

Three coins are flipped. what is the probability that there will be at least two tails?

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?