Theodore recently hired an electrician to do some necessary work. On the final bill, Theodore was charged a total of $750. $415 was listed for parts and the rest for labor. If the hourly rate for labor was $67, how many hours of labor was needed to complete the job?

What is the solution of the systems of equations? y=2/3x+3 x=-2

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297