-2+9 on a number line

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

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?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)