Mathematics - Algebra - Linear Equations
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(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?
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(1) Let the amount of pure antifreeze be x, and the amount of the 40% antifreeze be y.
Then, we have, ...
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