# math

posted by JT

Joan is 'y' years old. Her father is 4 times as old as she is and 28 years older than her brother. A-Find in terms of y, the age of Joan's brother. B- If 'y' =12, how old is her brother?

1. Steve

father = 4y = brother+28
brother = father-28, so 4y-28

2. Anonymous

1+1=

3. Anonymous

1+1+

4. Vic

J=8
F=4y
B=F-28 = 4y-28

If y=12 => B=4*12-28 =48-28=20
The brother is 20.

## Similar Questions

1. ### Math

FIve years ago Zack would have been three times older than his young brother but five years from now he will only be two times older than his brother. How old is his brother?
2. ### math

you are 6 years older than your sister she is 4 years older than your brother. write expressions to show your age and your sisters age if your brother is 4 years old.
3. ### math

A. A woman was 30 years old when her daughter was born.Her age is now 6 years more than three times her daughter's age. How old will the daughter be in 5 years?
4. ### math

Joan is three years younger than Martin. How old will Joan be when she is 4/5 his age?
5. ### Algebra

Mary is y years old. Write an algebraic expression in terms of y for the age of A) her brother, who is 4 years older. B) her mother, who is 3 times as old. C) her sister, who is 2 years younger.
6. ### analytical math

rony who is sixteen years old, is four times as old as her brother. How old will Mary be when he is twice as old as her brother?
7. ### Math

Joan is 15 years older than her brother Bill.Eight years from now,Joan will be twice as old as Bill.How old is each at this time?
8. ### Algebra

Kevin is 20 years older than his sister Joan.In 14 years,he will be twice as old as Joan.How old is of of them now?
9. ### Math

Joan is 5 years older than Ellen, and 3 years ago the sum of their ages was 17 years. In how many years will Joan be 21 years old?
10. ### MATH

Amy is "n" years old. Bob, her brother, is 9 years older than amy. Their mother is 3 times as old as Amy. Theirfather is twice as old as Bob. (i) Write down an expression, in terms of "n" their fathers age?

More Similar Questions