Answer:
I'm not 100% sure, but I think it's 3
60 seconds in a minute
12 goes into 60, 5 times,
So 5 * 28 = 140
140 claps per minute
0.5 minute is 30 seconds, half a minute so divide by 2,
140/2 = 70
70 times every 0.5 minutes
The answer is 25, leave a like (:
5(2a-6) = 10a-30 you would just multiply 2a and -6 by 5
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