Answer:
<em>y = (-4/3)*x + 7</em>
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Step-by-step explanation:
The point-slope form of the equation of a line is: <em>y = a*x + b </em>
In the above equation, <em>a </em>is the slope of the line representing the equation in the graph and y is the function of x [y = y(x)]
The given line has a slope of -4/3, so that <em>a = -4/3 </em>
=> The equation of this line has a form as following: <em>y = (-4/3)*x + b (1)</em>
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As the line passes through the point (9; -5) (in which: x = 9; y = -5). Replace x =9 and y = -5 into the equation (1), we have:
<em>y = (-4/3)*x + b</em>
<em>=> -5 = (-4/3)*9 + b </em>
<em>=> -5 = -12 + b </em>
<em>=> b = 7</em>
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So that the equation in point-slope form of the given line is:
<em>y = (-4/3)*x + 7</em>
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D.
(-4v*3v) + (-4v*-5) + (3v*7) + (7*-5)
-12v^2 + 20v + 21v -35
-12v^2 + 41v -35
Assuming your first equation is y = 5x+9, the equations describe lines that are coincident.
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Multiplying the second equation by -1, it becomes y = 5x+9, the same as the first equation.
So first you need to do the discount
(95)(0.9) = 85.5
then add the 4.5% sales tax:
(85.5)(1.045) = $89.35
