Question

You are y years old. Your sister is 3 years older than you. Your uncle is 4 times older than your sister. Write an expression that represents your uncle's age.

Show your work

Answer 1

u = 4y + 12

Explanation:

3 + y = s Eq. 1

u = 4s Eq. 2

s = my sister´s age

u = my uncle´s age

Replacing Eq. 1 in Eq. 2:

u = 4(3+y)

u = 4*3 + 4*y

u = 12 + 4y

My uncle´s age is 4 tmes my age plus 12 years.

Answer 2

Answer: (y + 3) x 4 = a

Explanation:

Lets say that y=3 ( Not Really)

so ( y[3] + 3 ) =6

6 x 4 = 24

so the expression will be (y + 3) x 4 = a