Question

Yin 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 25 years younger than her mother

Answer 1

Answer: a.(y+4) years old

b.3y years old

c.(3y-25) years old

Step-by-step explanation:

.  Yin is y years old

a.  since her brother is 4 years older then he is (y+4) years old

b.  since her mother is 3 times has old has her then her mother is

      3×y= 3y years old

c. Her sister is 25 younger than her mother

   since her mother is 3y years old then her sister is (3y-25) years old