One pen costs $
k. One stapler costs $(
k + 15). One guide book costs $4
k.
- Valen bought 6 pens, 3 staplers and 1 guide book. How much did he spend? Simplify your answer in terms of k.
- If k = 11, how much did Valen spend altogether?
(a)
Cost of 6 pens = 6 x
k = $6
k Cost of 3 staplers = 3 x (
k + 15) = $(3
k + 45)
Cost of 1 guide book = $4
k Total amount that he spent
= 6
k + 3
k + 45 + 4
k= 6
k + 3
k + 4
k + 45
= $(13
k + 45)
(b)
If
k = 11,
total amount that he spent
= 13
k + 45
= (13 x 11) + 45
= 143 + 45
= $188
Answer(s): (a) $(13
k + 45) or $(45 + 13
k); (b) $188