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George and Carmen went on a bike ride. they took a bus to their starting point, and then biked the rest. they traveled 275 kilometers in total, and they biked 55 kilometers more than they were bussed...

A mixture containing 6% tartaric acid is to be mixed with 2 quarts of a mixture that is 15% tartaric acid. How much of the 6% solution should you use to obtain a solution that is 12% tartaric acid...

on a special day, tickets for a minor league baseball game cost \$5 for adults and \$1 for students. The attendence that day was 1281 and \$3425 was collected. Write a system of equations to model ticket...

You have a cable plan that costs \$39 a month for a basic plan plus one movie channel. Your friend has the same basic plan plan plus two movie channels for \$45.50 . What is the basic plan charge that...

The amount of radioactive element (in grams) that remains after t years is given by the equation: A(t)= 12e^-0.0231t (a) How many grams of the radioactive element were originally present at time...