Charles buys 10 drinks and 3 sandwiches for $34. Isabel buys 5 drinks and 4 sandwiches for $37. They want to determine the cost of each item.
Write a system of linear equations to model the problem. Let d equal the cost
of each drink and let s equal the cost of each sandwich. Solve the system
algebraically. How much does each item cost?

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

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?