Marnie solved the proportion StartFraction 150 over 170 EndFraction = StartFraction x over 510 EndFraction to find the value of x in the enlarged parallelogram. A smaller parallelogram has a bottom side length of 170 centimeters and left side length of 150 centimeters. A larger parallelogram has a bottom side length of 510 centimeters and left side length of x centimeters.
Not drawn to scale

What is the value of x?
x = 255
x = 300
x = 340
x = 450

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

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

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?