A company sold equipment that originally cost $290000 for $203000 cash. The accumulated departing the equipment was $87000.The c
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Answer:
The equation that represents the number of persons buying the phone and the price of the phone is y = -0.75·x + 60
Step-by-step explanation:
The given data are as follows
x, p($)
10, 52.5
25, 41.25
40, 30
60, 15
We note that a plot of the given points give a straight line graph indicating a linear relationship
The rate of change of p($) with x is given by slope, m in the following relation;
Which gives;
Therefore, to write the equation in slope and intercept form, we have;
From the first point with coordinates (52.5, 10), we have
y - 52.5 = -0.75×(x - 10)
y = -0.75·x + 7.5 + 52.5 = -0.75·x + 60
The equation that represents the number of persons buying the phone and the price of the phone is y = -0.75·x + 60.
Answer:
Step-by-step explanation:
<u><em>The complete question in the attached figure</em></u>
<em>Verify each case</em>
Part 1) we have
solve for x
Part 2) we have
Multiply both sides by -1 and rearrange the terms on the left side to get
This expression is the same that the expression in Part 1)
That means, that the equations Part 1) and Part 2) are equivalent
therefore
Part 3) we have
Remember that
This expression is the same that the expression in Part 1)
That means, that the equations Part 1) and Part 3) are equivalent
therefore
Part 4) we have
This equation is not equivalent to the other three, because some terms are multiplied by -8/7 and others are not. When different things are done on either side of the equal sign, it changes the equation, resulting in a different solution
