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.
Answer:

Step-by-step explanation:
Given
Total number of bouquets sold yesterday 
Total number of rose bouquets sold yesterday 
Then the probability of selling a rose bouquet out of total 50 bouquet is

Probability of selling other than rose bouquet out of total 50 bouquet is
probability of selling a rose bouquet
Substituting the given values in above equation we get -

Probability that the next bouquet sold will be a rose bouquet

Im sure this is the correct answer, 4x = 21x
Answer:
<u>8.6</u>
Step-by-step explanation:
If we know 10% of a number is 4.3, we can easily find 20% of the number as well.
We know 20% is 2 times 10%.
Therefore,