Molly and Tess like to shop at the mall. Their sister Jessica prefers to play bocce ball instead. Molly has $280 in her bank account and spends $40 on every trip to the mall. Tess has $170 in her account and spends half as much as Molly during each trip. Jessica has $50 in her account and does not spend any of it. a. How many trips to the mall will it take for the Molly and Tess to have the same amount of money in their accounts? Show all of your work and explain your method for calculating the number of trips. HINT: Make some equations

b. When will Jessica have the largest bank account? How do you know?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9