n example 3, your friend says that there is enough information to determine the numbers of solutions of the equations $3(5x+2)=1
5x$ and $-2(4y+1)=-8y-2$ once you obtain $15x+6=15x$ and $-8y-2=-8y-2$ . Is your friend correct?
1 answer:
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An equation is formed of two equal expressions. The value of x that maximizes the area of the printed region of the billboard is 9.655 ft.
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
Given x is the left-right width of the billboard and y is the height of the billboard. Therefore,
The total area of the billboard, A= x·y
The total printed area of the billboard,
Given in problem that the area of the billboard is 3600 ft².
x·y = 3600
y = (3600)/x
Substituting the value of y in the equation of the total printed area of the billboard,
Now, the value of x is needed to be minimum, therefore, differentiating the given function,
Equate the differentiated function with 0,
Hence, the value of x that maximizes the area of the printed region of the billboard is 9.655 ft.
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Answer:
- Therefore, <em><u>-2</u></em> is the right answer.