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MATH133 Unit 1 Individual Project A / (AIU)

Question # 00007560
Subject: Mathematics
Topic: Algebra
Due on: 03/31/2014
Posted On: 01/31/2014 12:06 PM

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1) The following graph shows the depreciation for the corporate airplane from 2006
to 2009. The plane was purchased new in 2006; therefore, x = 0 represents the
year 2006.

X – axis (horizontal) = years starting from 0 = 2006 and increasing by 0.5 years
Y – axis (vertical) = price in $ amounts from 24,000 to 240,000
a) List the coordinates of two points on the graph in (x, y) form. The numbers on
the horizontal axis are 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 3.5.
(___, ___),(___, ___)

b) Find the slope (rate of depreciation) of this line:

c) Find the linear equation of this line in slope-intercept form.

d) If the rate of depreciation continues at the present rate, what will be the plane’s
value in the year 2019? Show how to use the linear equation from part c) to
obtain your answer.

2) Suppose that the width of a rectangle is 5 inches shorter than the length and that
the perimeter of the rectangle is 80 inches. The formula for the perimeter of a
rectangle is P=2L+2W.

a) Set up an equation for the perimeter involving only L, the length of the rectangle.

b) Solve this linear equation algebraically to find the length of the rectangle. Find
the width as well.

3) A marketing group developing online ad space is offering two payment options:
Option 1: $225 set up fee plus $10/inch of the ad
Option 2: No set up fee but $25/inch of the ad

Let x = inches of the proposed ad, for example, x = 2 for a column ad that is 2
inches long.

a) Write a mathematical model representing the total ad cost, C, in terms of
x for the following:
Option 1: C=_________________
Option 2: C=_________________

b) How many inches of ad space would need to be purchased for option 1
to be less than option 2? Set up an inequality and show your work
algebraically using the information in part a).

4) Graph the equations on separate graphs by completing the tables and plotting
the points. You may use Excel or another web-based graphing utility.

a) Complete the table using the given values of x and the equation y = -3x + 7.
b) Graph the equation here by plotting the points from your table.For help on

creating your graph in Excel and inserting graphs into a Word Doc please see the

tutorial in the Assignment List.

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MATH133 Unit 1 Individual Project A

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