MATHEMATICS · Multi-part · CBSE · Mathematics · Linear Equations in Two Variables · Linear Equations in Two Variables
Problem
At a sushi restaurant, nigiri costs 4.50 dollars per serve and sashimi costs 9.00 dollars per serve. Hiroko spent a total of 45 dollars buying x serves of nigiri and y serves of sashimi.
(1) Explain why 4.5x+9y=45.
(2) If Hiroko bought 4 serves of nigiri, how much sashimi did she buy?
(3) If Hiroko bought 1 serve of sashimi, how much nigiri did she buy?
(4) Draw the graph of 4.5x+9y=45. Mark two points on your graph to indicate your answers to parts b and c.