T = 4 + 2A
S = 5A - 8
T = S
Since T and S are equal, set them against each other
2A + 4 = 5A - 8
Subtract 2A from each side, and add 8 to each side
12 = 3A
Divide each side by 3
A = 4
So Andrew is 4 years old
If Andrew is 4, then Tom is twice that plus 4, or 12. Sarah is 5 times 4 less 8, or 12.
♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️♂️
The probability the first marble will be blue is 28/40
The probability the second marble will be red is 12/39
The reason is because 28 + 12 = 40, so this makes the denominator for our first outcome, but then a marble is removed making our denominator 39 because 40-1 = 39.
1-18.6
2-75
3-19.02
4- -20.005
5-75.12
6-41
7-124
8-133.192
9-24.09
10–42.992
