One coin costs $
t. One pencil costs $(
t + 15). One colouring book costs $5
t.
- Bobby bought 3 coins, 3 pencils and 1 colouring book. How much did he spend? Simplify your answer in terms of t.
- If t = 19, how much did Bobby spend altogether?
(a)
Cost of 3 coins = 3 x
t = $3
t Cost of 3 pencils = 3 x (
t + 15) = $(3
t + 45)
Cost of 1 colouring book = $5
t Total amount that he spent
= 3
t + 3
t + 45 + 5
t= 3
t + 3
t + 5
t + 45
= $(11
t + 45)
(b)
If
t = 19,
total amount that he spent
= 11
t + 45
= (11 x 19) + 45
= 209 + 45
= $254
Answer(s): (a) $(11
t + 45) or $(45 + 11
t); (b) $254