Question

Anita works for a dog-walking service. She earns $10 plus $2 for each dog she walks. She calculates her earnings by using the equation P = 2N + 10, where P is the total pay in dollars, and N is the number of dogs she walks. If Anita wants to earns at least $40, what is the minimum number of dogs she must walk?

Answer 1

She must walk at least 15 dogs

Explanation:

Let's assume P, the total pay in $, is $40

40=2N+10

Solve the equation:

40=2N+10

Subtract 10 from both sides

30=2N

Divide 2 from both sides

15=N

Answer: She must walk at least 15 dogs

Another way to do it:

We know she earns $10 as her base salary. So, she needs to walk dogs to earn the rest of the $30 ($40-$10)

If she earns $2 for each dog she walks, simply divide $30 (total) by $2 (amt for each dog walked).

= 15

She must walk 15 dogs.

Hope it helps!!