Jack's father is 3 times older than jack. 5 years ago the sum of their ages was 34. How old is jack now?

Jack's present age is = 11 years.

Lets take jack's age to be = J

Jack's father is 3 times older than jack = 3 × J = 3J

But , 5 years ago the sum of their ages was 34.

That is, (J - 5) + ( 3J - 5) = 34

Open up the bracket and bring the like terms together,

4J - 10 = 34

4J = 34 +10

4J = 44

J = 44/4

J = 11

Therefore, Jack's present age is = 11 years.

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11 years

Step-by-step explanation:

Let age of Jack is x. Jack's father is 3 times older than jack.

Age of Jack's father = 3x

5 years ago,

Jack's age = x-5

Father's age = 3x-5

ATQ,

5 years ago the sum of their ages was 34.

x-5+3x-5=34

4x-10=34

4x=44

x=11

So, the present age of Jack is 11 years.

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.