1. You purchase a bag of chips that cost $4. The sales tax is 6.5% what will be the total cost. 2.You buy some shoes that cost $100. Your total, with tax, is $106. what is the sales tax rate.

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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.