Question

Melissa will participate in a charity walkathon. Her mother will donate $10 for Melissais
participation plus an additional $2 for each mile that Melissa walks.
a) If Melissa walks 15 miles, what will be the amount of her mother's donation?​

Answer 1

Let x represent number of miles.

We have been given that Melissa's mother will donate $2 for each mile that Melissa walks. So amount donated by Melissa's mother for x miles would be $2x$.

We are also told that her will donate $10 for Melissa's participation. The total amount of money donated by Melissa's mother will be participation amount plus amount donated for x miles.

$\text{Amount of total donation}=2x+10$.

To find amount of her mother's donation, we will substitute $x=15$ in our equation.

$\text{Amount of total donation}=2(15)+10$

$\text{Amount of total donation}=30+10$

$\text{Amount of total donation}=40$

Therefore, the amount of Melissa's mother's donation would be $40.