Henry needs to sale 14 rings for his revenue to equal his expenses.
Step-by-step explanation:
Given,
Selling price of ring = $8
Expense on one ring = $1.50
Cost of supplies = $91
Let,
x represent the number of rings.
Expenses = 91+1.50x
Revenue = 8x
Equal expenses means;
Revenue = Expenses
Dividing both sides by 6.5
Henry needs to sale 14 rings for his revenue to equal his expenses.
Keywords: revenue, division
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It'd be best if you'd stick to symbols. My interpretation of what you've typed here is 20x - 20x^2 + 5x^3. In descending order by powers of x, that gives us
5x^3 - 20x^2 + 20x.