MathBits.com presents ...
box4
            Grab your TI-84+
             graphing calculator!
84 logo
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You are a techno star!
This is hidden Box #4!
Before you begin: Be sure the calculator is set to default mode, as shown at the right. Hit the MODE key and be sure all entries are highlighted on the left. If not, use your arrow keys to move to the left and press ENTER to highlight, as you arrow down the screen.

Now, answer the following 5 questions.		 mode screen
Box 4 - Basic Operational Skills:
1. The calculator can be used to check your algebraic multiplying or factoring skills. The screen at the right shows (x - 6)² being checked factor
with two possible answers. The 0 indicates that the first answer is "false" and the 1 indicates that the second answer is "true". To get the = sign, press 2ndmath1. Which numbered choice below shows a false statement?
1) (x + 2)(x - 2) = x² - 4 2) (x - 4)(x + 8) = x² - 4x - 32
3) (x + 3)² = x² + 6x + 9 4) (x - 12)² = x² - 24x + 144

 


2. The sq symbol is found above xsquared. Using the calculator and the Pythagorean Theorem, find the hypotenuse of a right triangle whose legs are 8 and 15. Which numbered choice shows the answer?
1) 17 2) 19 3) 21 4) 23

 

 

 

 

3. The symbol for absolute value can be found in the CATALOG: 2nd0 abs(    
or under math, arrow right to NUM, 1 abs(
Which numbered choice is equivalent to | -49 - (-17)| ?
1) -32 2) 32 3) -66 4) 66

 

 

 

4. Trigonometry is used to find x in the accompanying diagram. Since this problem works in degrees, set the modeto degrees and then press sin35.
rttri
The equation is sin35. Replace sin 35º with the calculator entry and solve for x to nearest tenth.
1) 0.6 2) 3.4 3) 3.5 4) 4.1

 

 

 

5. Inequalities such as inequl can be entered on the calculator under y=. The "lessthan=" can be found under 2ndmathsix. When graph2 is pressed, the solution is shown to be inequal4. The TABLE (2ndgraph) shows "1" for values that make the inequality true, and "0" for those that will be false.
Which numbered choice shows the correct solution to the inequality
I0 ?

inequal1

inequl2

ineqtable
1) i2 2) i3 3) i1 4) I4

 


Read carefully!!
Find the sum of 84 raised to each of the five answers. Place this answer in the address below (following the capital letters "GC"), and type the address into your browser to find the next hidden box.

http://mathbits.com/caching/GC__________.html