Khalil is taking a multiple choice test with a total of 80 points available. Each question is worth exactly 2 points. What would be Khalil's test score (out of 80) if he got 7 questions wrong? What would be his score if he got x questions wrong?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?