Answer: 45
Step-by-step explanation: 21 x 3 = 63, because 3x3 is 9. 9 tickets with a $2 discount would mean you take off $18, so I believe the answer would be 63-18=45.
K^2 - 100h^2
(k - 10h)(k + 10h)
39 is 25% of 156.
Work: 156 x 0.25 = 39 which means that 25% of 156 is 39.
Hope this helps and please mark as brainliest!
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