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Linear equations in two variables SAT question
Math · Algebra · Easy · Answer it here, explanation included.
Mario purchased 4 binders that cost x dollars each and 3 notebooks that cost y dollars each. If the given equation represents this situation, which of the following is the best interpretation of 24 in this context?
ExplanationShow
Choice C is correct. Since Mario purchased 4 binders that cost x dollars each, the expression 
represents the total cost, in dollars, of the 4 binders he purchased. Since Mario purchased 3 notebooks that cost y dollars each, the expression 
represents the total cost, in dollars, of the 3 notebooks he purchased. Therefore, the expression 
represents the total cost, in dollars, for all binders and notebooks he purchased. In the given equation, the expression is equal to 24. Therefore, it follows that 24 is the total cost, in dollars, for all binders and notebooks purchased.
Choice A is incorrect. This is represented by the expression in the given equation. Choice B is incorrect. This is represented by the expression in the given equation. Choice D is incorrect. This is represented by the expression 
.
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