13) A rectangular photo measures 15 cm by 20cm. It is enlarged so that the length of the shorter side is 21 cm. What would be the length of the longer side?

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.