Ted buys blocks
of spruce for 
dollars each, and 
blocks of mahogany for 
dollars each. In a given month, Ted spends a total of 
dollars, where 
. The price of a block of mahogany, given that a block of spruce costs 5/9 as much as a block of mahogany, and Ted has bought 12 blocks of spruce and 15 blocks of mahogany for a total cost of $9750. Write an equation whose solution is the given quantity.
1 answer:
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Answer:
The focus is:
Step-by-step explanation:
Given
Required
Determine the focus
The focus of a parabola
is:
So, we have:
Cross multiply
Rewrite as:
Rewrite as:
Express 8 as 4 * 2
By comparison with:
So, the focus is: