A class consists of 16 kids, 6 boys and 10 girls.
Emily questioned all the students and discovered that
8 out of 10 girls prefer valentines day over birthdays, but only 2 out of 6 boys prefer valentines day over birthdays.
What is the ratio of children in the class that prefer valentines day over birthdays.
SOURCE: how do i multiply a (2x2) matrix by a (2x1) in the ti 89
Hello,
The so-called (2x1) matrix is not a matrix. It is a vector.
Hope it helps.
SOURCE: Trying to get the inverse of a matrix
Hello,
The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.
Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix
The matrix used in the exemple is
a_11=2 a_12=1 a_21=1 a_22=2
Here is the link to download the manual and the appendix
http://support.casio.com/manualfile.php?rgn=1&cid=004001004
Hope it helps
SOURCE: Argument error whenever I type equations with variables.
Perhaps you have some data stored in the x variable.
With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.
If you find x in the list, highlight x, then press F1, and then select delete.
Now it should work like normal.
SOURCE: how to simplify the equations in ti 84 ??
You cannot do it with this calculator. It does not have a Computer Algebra System (CAS). Try a TI89 Titanium, a TI 92PLUS, a TI 200PLT or a TI-Nspire CAS.
However, they may exist other programs on education.ti.com or ticalc.org. Search these sites and you may be lucky.
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