Elena sells two kinds of pasta, plain and spinach. Both types take 4 cups of flour per batch. The plain pasta uses 2 eggs per batch, and the spinach pasta uses just one. She
wants to make both types using all the ingredients she has: 12 cups of flour and five
eggs. How many batches of spinach pasta will she make?

Multiple Choice question...ANSWER CHOICES BELOW-( systems of equations)

• 4 batches
• 1 batch
•5 batches
• 2 batches

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