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MPM2D Name: ______________________ Review: Solving Equations An _____________ is a mathematical statement that says two expressions are equal. 3 5 3 2 + = x x To ____________ is to find the value of the variable that makes the statement true. Example 1: The cost to produce school t-shirts is modeled by the equation 1200 4 C n = , where C is the total cost and n is the number of t-shirts. a) How much would it cost to produce 400 t-shirts? b) How many t-shirts could be made for $8000? Example 2: A formula was developed to determine the strength of the taste of chocolate in different chocolate drinks. The formula, 2 3 2 S c = , where S is the strength of the taste of chocolate in yahoos, and c is the amount of chocolate needed in grams. a) What would the strength of the chocolate taste be if 39 grams of chocolate were used? b) If a company wants a strength of 25 yahoos, how much chocolate is needed? ___________ ___________
MPM2D Name: ______________________ Example 3: If the width of the rectangle is 2 times the length plus 5, what are the dimensions if the perimeter is 70m? Let ____________ be _________________________ Let ____________ be _________________________ Example 4 : Solve the following: 1) 18 4 3 = x x x 2) 5 2 3 16 x x = + 3) ) 5 2 ( 2 40 ) 11 14 ( 2 = x x x 4) 6 3 1 2 1 9 x x + = +
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