Adam earns $2 for every car he washes.
He gets $3 bonus for every 4 cars he washes.
- How much will Adam earn if he washes every 4 cars?
- If Adam wants to earn $17, how many cars must he wash?
- If Adam wants to earn $33, how many cars must he wash?
- If Adam wants to earn $24, how many cars must he wash?
(a)
Amount that Adam will earn for washing every 4 cars
= 2 x 4 + 3
= $11
(b)
Number of sets of $11
= 17 ÷ 11
= 1 r 6
Number of cars in 1 set
= 1 x 4
= 4
Number of extra cars that he has to wash
= 6 ÷ 2
= 3
Total number of cars that Adam must wash
= 4 + 3
= 7
(c)
Number of sets of $11
= 33 ÷ 11
= 3 (Note that there is no remainder.)
Total number of cars that Adam must wash
= 3 x 4
= 12
(d)
If Adam wants to earn $24, how many cars must he wash?
Number of sets of $24
= 24 ÷ 11
= 2 r 2
Number of cars in 4 sets
= 2 x 4
= 8
Number of extra cars that he has to wash
= 2 ÷ 2
= 1
Total number of cars
= 8 + 1
= 9
Answer(s): (a) $11; (b) 7; (c) 12; (d) 9