Use the work shown below to solve. 1. Identify the operation in the equation.

2. Use inverse operations to solve.

Subtraction property of equality

3

2

= k + 11

2

3

2

− 11

2

= k + 11

2

− 11

2

Addition property of equality

3

2

+ (− 11

2

) = k + 11

2

+ (− 11

2

)

The solution is k =

-7

-4

StartFraction 13 over 2 EndFraction

StartFraction 15 over 2 EndFraction

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