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Grade 9 Mathematics IW 4 (Cycles 9-11)Guide Card SY 2022 - 2023
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A suspicion that a “gold” crown contained some silver was verified by using a system of linear equations. The crown was found to weigh 45 ounces with a volume of 5 cubic inches. Gold weighs 11 ounces per cubic inch while silver weighs 6 ounces per cubic inch. Is there silver mixed with the gold, and if so, how much? Representing the volume of gold per cubic inch as x and the volume of silver per cubic inch as y, the given situation was expressed as the system of equations, as follows:Loading...
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Grade 9 Mathematics IW 4 (Cycles 9-11)Guide Card SY 2022 - 2023
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The values of x and y were solved and it was found out that indeed the crown was not of pure gold. In this session, we will learn about Systems of Linear Equations in Two Variables: how they are solved and how they are used in real-life situations. Study this topic first before doing the activity card. You may read pp. 264-274 of your text book last year or any other reference with this topic.
(Source: Worktext in Mathematics for Second Year High School by Oronce, Orlando)