1 bead costs $8.
For every 10 beads bought, a discount of $6 is given.
- How much do 10 beads cost?
- How much do 19 beads cost?
- How much do 34 beads cost?
(a)
Cost of every 10 beads
= 10 x 8 - 6
= 80 - 6
= $74
(b)
Number of beads that do not belong to a set
= 19 ÷ 10
= 1 r 9
Cost of the 9 extra beads
= 9 x 8
= $72
Cost of 19 beads
= 74 + 72
= $146
(c)
Number of sets of 10 beads
= 34 ÷ 10
= 3 r 4
Cost of 30 beads
= 3 x 74
= $222
Cost of 4 beads
= 4 x 8
= $32
Cost of 34 beads
= 222 + 32
= $254
Answer(s): (a) $74; (b) $146; (c) $254