One eraser costs $
a. One marker costs $(
a + 15). One story book costs $5
a.
- Daniel bought 6 erasers, 3 markers and 1 story book. How much did he spend? Simplify your answer in terms of a.
- If a = 7, how much did Daniel spend altogether?
(a)
Cost of 6 erasers = 6 x
a = $6
a Cost of 3 markers = 3 x (
a + 15) = $(3
a + 45)
Cost of 1 story book = $5
a Total amount that he spent
= 6
a + 3
a + 45 + 5
a= 6
a + 3
a + 5
a + 45
= $(14
a + 45)
(b)
If
a = 7,
total amount that he spent
= 14
a + 45
= (14 x 7) + 45
= 98 + 45
= $143
Answer(s): (a) $(14
a + 45) or $(45 + 14
a); (b) $143