Gwyneth begins solving for x in the equation 2 (x minus 4) = 5 (4 minus 2 x) + 4 x. After applying the distributive property and combining like terms, which equation will Gwyneth have to solve in order to determine the value of x? 2 x minus 8 = 20 minus 14 x
2 x minus 8 = 20 minus 6 x
2 x minus 4 = 20 + 2 x
2 x minus 4 = 20 minus 6 x

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

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