One card costs $
j. One pencil costs $(
j + 15). One colouring book costs $4
j.
- Tom bought 2 cards, 3 pencils and 1 colouring book. How much did he spend? Simplify your answer in terms of j.
- If j = 11, how much did Tom spend altogether?
(a)
Cost of 2 cards = 2 x
j = $2
j Cost of 3 pencils = 3 x (
j + 15) = $(3
j + 45)
Cost of 1 colouring book = $4
j Total amount that he spent
= 2
j + 3
j + 45 + 4
j= 2
j + 3
j + 4
j + 45
= $(9
j + 45)
(b)
If
j = 11,
total amount that he spent
= 9
j + 45
= (9 x 11) + 45
= 99 + 45
= $144
Answer(s): (a) $(9
j + 45) or $(45 + 9
j); (b) $144