Question:
Algebra - Linear Equations
(1) Angela needs 20 quarts of 50% antifreeze solution in her radiator. She plans to obtain this by mixing some pure antifreeze with an appropriate amounts of a 40% antifreeze solution. How many quarts of each should she use?
(2) The saddle height on a bicycle should be 109% of the ride's inside leg measurement L. What is the equation expressing the fact that the saddler height for Brenda is 36in?