Colleen bought 8 kilograms of apples and 2.5 kilograms of pears. how many more grams of apples than pears did she buy?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units