1 bead costs $7.
For every 10 beads bought, a discount of $6 is given.
- How much do 10 beads cost?
- How much do 14 beads cost?
- How much do 22 beads cost?
(a)
Cost of every 10 beads
= 10 x 7 - 6
= 70 - 6
= $64
(b)
Number of beads that do not belong to a set
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra beads
= 4 x 7
= $28
Cost of 14 beads
= 64 + 28
= $92
(c)
Number of sets of 10 beads
= 22 ÷ 10
= 2 r 2
Cost of 20 beads
= 2 x 64
= $128
Cost of 2 beads
= 2 x 7
= $14
Cost of 22 beads
= 128 + 14
= $142
Answer(s): (a) $64; (b) $92; (c) $142