Estimate and then solve the equation x-17 4/5=13 1/5

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

The graph shows the distance kerri drives on a trip. what is kerri's speed?

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?