Question

Tim is y years old. Sam is 3 years older than Tim. (3)

a. Write an expression for Sam’s age in terms of y.

b. Write the formula for the total age, T of Tim and Sam.

c. Using formula from b. work out y when T = 18.​

Answer 1

Answer:

7 1/2 years

Step-by-step explanation:

Tim is y years old

A)

Sam is 3 years older than Tim

= sam's age

= y+3

b)

total age = T = (y) + (y+3)

T = 2y + 3

c)

T = 18

2y + 3= 18

2y = 18-3 = 15

y = 15/2

y = 7 1/2 years