John’s age in 5 years time will be the same as Jack’s age is now. In two years, Jack will be twice as old as John. How old are they now?

john 2 1/2 years old jack is 7

in 5 years he will be 7 like jack is now

in two years jack is 9 and john is 4.5

Step-by-step explanation:

You could also say john is 3 and jack 8 in 5 years he is 8 like jack

and in 2 years he is 5 and jack is 10 which is twice the age.

it doesn't work for other ages.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

answer: i realy don't get it that much can you me figer it out pleas you

step-by-step explanation: