If d(x) = x2 - 7x - 7, find d(x - 1).
1 answer:
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For quarters we have:
Where,
x: number of quarters
Clearing x we have:
For nickels we have:
Where,
y: number of nickels
Clearing y we have:
Then, the ratio of quarters to nickels is:
Simplifying we have:
Answer:
The ratio of quarters to nickels in a dollar is: