Standard Form — Quiz

Question 3 • Mathematics 8

Which situation could best be represented by this linear equation? 24 x plus 38 y is equal to 520

Answer

If x represents the number of bracelets and y represents the number of rings, there were 520 bracelets and rings sold. Bracelets were 24 dollars , and rings were 38 dollars .

If x represents the number of bracelets and y represents the number of rings, there were 38 more bracelets sold than rings. The total sales were 520 dollars .

If x represents the number of bracelets sold at 24 dollars each and y represents the number of rings sold at 38 dollars each, the total sales were 520 dollars .

If x represents the number of bracelets and y represents the number of rings, there were 24 more bracelets sold than rings. The total sales were 520 dollars .

Explanation

The equation 24x + 38y = 520 adds the sales from two products: 24 dollars for each of x bracelets and 38 dollars for each of y rings, for a total of 520 dollars. Choice C describes exactly this situation. Choices B and D describe a difference in the numbers sold, which would require a subtraction equation.

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