Mathematics
keishlyand
2020-04-16 15:01:00
when kara and Lauren add their ages, the sum is 20 when they multiply their ages, the product is 99 what is difference in their ages?
ANSWERS
JoannieOshey582
2020-04-16 21:09:09

x+y=20 xy=99 Let a+b be denoted a,b 20 = 1,19 2,18 3,17 4,16 5,15, 6,14 7,13 8,12 (9,11) ..Stop 99=3^2*11 Thus the ages are 11 and 9 with a difference of 2.

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