Question

Martha wants to buy a new bike that costs $79 including tax. She currently has $15 saved. She began a dog walking business to earn the remaining money needed to buy the bike. She charges five dollars for each dog she walks. What is the fewest number of dogs that Martha needs to walk to have enough money to buy the bike?

Answer 1

10 that will be enough money

Answer 2

Answer: The fewest number of dogs are 13 that Martha needs to walk to have enough money to buy the bike.

Explanation:

Since we have given that

Price of new bike including tax = $79

Amount she saved till now = $15

Remaining amount she needed to bought a bike is given by

`79-15=\$64`

Amount she charges for each dog she walks = $5

so, Number of dogs she must walk to get the remaining amount is given by

`(64)/(5)\\\\=12.8\\\\\approx 13`

Hence, the fewest number of dogs are 13 that Martha needs to walk to have enough money to buy the bike.