HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 280
Exercise 5
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hp40g+.book Page 6 Friday, December 9, 2005 1:03 AM Exercise 5 16-6 17x + 20y = 90 10x + 25y = 90 Press , select LINSOLVE and press . Enter 17 Y X 90 X 20 90 10 25 Y X Y If you are working in step by step mode, pressing produces the result at the right. Press again to produce the next step in the solution: Press again to produce the reduction result: Pressing again produces the final result: If you select 1---4-- , and press 5 you get X = 2 and Y = 2.8. In other words, the price of one biscuit is 2 cents, and the price of one macaroon is 2.8 cents. Suppose that A and B are points having the coordinates (-1, 3) and (-3,-1) respectively, and where the unit of measure is the centimetre. Step-by-Step Examples
16-6
Step-by-Step Examples
Press
, select
LINSOLVE and
press
.
Enter 17
X
20
Y
90
10
X
25
Y
90
X
Y
If you are working in step
by step mode, pressing
produces the result
at the right.
Press
again to
produce the next step in the
solution:
Press
again to
produce the reduction
result:
Pressing
again
produces the final result:
If you select
, and press
you get X = 2 and Y
= 2.8.
In other words, the
price of one biscuit is 2
cents, and the price of one
macaroon is 2.8 cents.
Exercise 5
Suppose that A and B are points having the coordinates
(–1, 3) and (–3,–1) respectively, and where the unit of
measure is the centimetre.
17
x
20
y
90
=
+
10
x
25
y
90
=
+
14
5
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hp40g+.book
Page 6
Friday, December 9, 2005
1:03 AM