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Algebra_2
Chapter 42
Problem 1
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Suppose the ratio of red (R) marbles to yellow (Y) marbles in a bag is 9 to 5.
If there are 1428 marbles in the bag, how many of the marbles are red?
The ratio of red to yellow marbles can be written as
The total number of marbles R + Y = 1428.
By substituting Y =
5/
9R into R + Y = 1428 and solving for R you get
(9)}{14} = 918 )
red marbles.
Try this solution by entering (9)(1428)/14 into the Graphing Calculator in the
Function = box .
Click on the
Enter your Function button
Click on the
Plot Graph box to obtain your solution as f(x) = 918
