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.
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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
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