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 $5 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?

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 $5 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?
 Help Me Please

Ms. Sue · Accepted Answer

(79 - 15) / 5 = ________ dogs Remember, she can't walk a fraction of a dog.

Emmy · Answer

So the answer is 64/5=12.8 so basically it would be 12 or 13

Ms. Sue · Answer

Which is it? 12 or 13? Only one of these answers is correct.

Emmy · Answer

Its fewest which is 12

Ms. Sue · Answer

But 12 * 5 is 60. That isn't enough.

Emmy · Answer

Do 12*5+15=75.

Ms. Sue · Answer

Yes. But the bike costs $79. She needs $64.