One pen costs $
y. One marker costs $(
y + 15). One guide book costs $3
y.
- Tim bought 2 pens, 3 markers and 1 guide book. How much did he spend? Simplify your answer in terms of y.
- If y = 19, how much did Tim spend altogether?
(a)
Cost of 2 pens = 2 x
y = $2
y Cost of 3 markers = 3 x (
y + 15) = $(3
y + 45)
Cost of 1 guide book = $3
y Total amount that he spent
= 2
y + 3
y + 45 + 3
y= 2
y + 3
y + 3
y + 45
= $(8
y + 45)
(b)
If
y = 19,
total amount that he spent
= 8
y + 45
= (8 x 19) + 45
= 152 + 45
= $197
Answer(s): (a) $(8
y + 45) or $(45 + 8
y); (b) $197