Chapter 5: Linear Systems Name
Section 2: Using Algebra Date
Topics in Algebra 1 © 2001, 2002 Texas Instruments Student Worksheet 5-25
To Do This Press Display
6. To find the solution, you want to find
when the two equations are equal.
Find Y1 = Y2. You need to enter
L
4X + 2 = 2x
N
2.5 on the
eqn: line.
a
4 I \ 2
7. Find the equal sign (=) in
- t
.
- t
# # # b
#
8. Finish entering the equation.
b
2
I T
2 ` 5
9. Enter a guess of X=1 as the solution.
The calculator needs a starting value
for its computation.
Hint: bound = {L1å99, 1å99} represents the real
number line for the calculator. You can make the set
smaller to find solutions in a particular interval. See
the TI-73 guidebook for more details.
b : 1
10. Highlight X on the Solve:X line and
the solution is given as
$X=.75.
Notice that
$ appears after the
calculator has computed the
numerical solution.
# # b
11. Find the Y1 and Y2 values on the
home screen using X. The value
0.75 will be stored in the X variable
in the calculator. X is fixed at 0.75
once you follow these steps.
Important Reminder: The calculator always has
some value stored in each variable. You must store
the value you want in order to understand how the
calculator interprets a variable expression.
- l :
` 75
X I b
12. Enter L4X + 2 to find the Y1 value.
Notice that the output is L1.
a
4 I \ 2 b
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