A jeweler purchased 5 oz. of gold and 10 oz. of platinum for a total cost of $2375. In a second purchase at the same prices, the jeweler bought 8 oz. of gold and 7 oz. of
platinum for a cost of $2225. What is the cost per ounce of the gold and the platinum?

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.