Free points cause no one took the other one I posted..

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.

Find the value of x in the diagram below. select the best answer from the choices provided