- for , and
- for , and
- for , and
- for and
- for and
- VEHICLE WEIGHTS A Hummer H2 weighs
340 pounds less than twice a Honda Element.
a. Let represent the weight of one of the vehicles.
Write an expression for the weight of the other
vehicle.
b. If the weight of the Element is 3,370 pounds, what
is the weight of the Hummer?
- SOD FARMS The expression gives the
number of square feet of sod that are left in a field
after strips have been removed. Suppose a city
orders 7,000 strips of sod. Evaluate the expression
and explain the result.
- COMPUTER COMPANIES IBM was founded
80 years before Apple Computer. Dell Computer
Corporation was founded 9 years after Apple.
a. Let represent the age (in years) of one of the
companies. Write expressions to represent the
ages (in years) of the other two companies.
b. On April 1, 2008, Apple Computer Company was
32 years old. How old were the other two computer
companies then?
x
Strips of sod, cut and
ready to be loaded on
a truck for delivery
s
20,000 3 s
x
APPLICATIONS
a^14 b 10
b^2 16 a^2 1
2
(27c^2 4 d^2 )^3 c 31 d 21
a5, r 2 n 3
a(1rn)
1 r
d6.6
n10, a4.2
n
2
[2a(n1)d]
x2, y1, a 5 b 2
ax
yb
- THRILL RIDES The distance in feet that an object
will fall in seconds is given by the expression.
Find the distance that riders on “Drop Zone” will
fall during the times listed in the table.
- What is a variable? Give an example of how
variables are used.
- What is an algebraic expression? Give some
examples.
- Explain why 2 less than xdoes not translate to.
- In this section, we substituted a number for a
variable. List some other uses of the word substitute
that you encounter in everyday life.
- Find the LCD for and.
- Simplify:
- Evaluate:
- Find the result when is multiplied by its
reciprocal.
7
8
a
2
3
b
3
3 3 5
3 5 5 11
1
15
5
12
REVIEW
2 x
WRITING
©Joel Rogers, http://www.coastergallery.com
t 16 t^2
8.1 The Language of Algebra 647
Time Distance
(seconds) (feet)
1
2
3
4
