Bella and heather put some money into their money boxes every week. the amount of money (y), in dollars, in their money boxes after a certain amount of time (x), in weeks, is shown by the equations below:

bella: y = 25x + 60
heather: y = 30x + 10

after how many weeks will bella and heather have the same amount of money in their money boxes, and what is that amount? (4 points)

a. 10 weeks, $10

b. 10 weeks, $310

c. 9 weeks, $310

d. 310 weeks, $10