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Unformatted text preview: esent quantities in problems. These variables can then be used to write
expressions to represent other quantities. exercise: Write an algebraic expression for each quantity described below.
a) Let x represent a number; the quantity is another number
that is five less than twice the first number.
b) Let n represent the number of nickels; the quantity is the
value (in cents) of these nickels.
c) Let t represent the number of hours a car travels; the
quantity is the number of kilometres the car moving at
50 km/h went.
d) Let w represent the tailwind speed in km/h; the quantity is
the speed of a plane (in km/h) that flies at 450 km/h in still
e) Let P represent the dollar amount placed in a bank
account that earns interest at 3% per annum; the quantity
is the yearly dollar amount of the interest earned. example: 40 m of wire fencing will be used to make a
rectangular plot that encloses a play area for
your pet dog. A wall of your house is to serve as
one side of the plot. Write a function for the
plot's area. ____________________ house
plot 1. Understand the problem.
• What is to be determined?
• What is given?
• Draw a diagram.
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