There are 13 animals in the barn. Some are chickens and some are pigs. There are 40 legs in all. How many of each animal is there. Set up a system of equation and solve

Can (3,5 and square root 34) be sides on a right triangle?

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?