Margo can purchase tile at a store for $0.79 per tile and rent a tile saw for $21. At another store she can borrow the tile saw for free if she buys tiles there for $1.09 per tile. How many tiles must she buy for the cost to be the same at both stores? Margo must buy tiles for the cost to be the same at both stores.

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?

What is the slope of the line (-7,2) (4,6)

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.