On a Ti 84, enter whatever you need in prgm, and then go to mem. and choose 5) Archive and then choose your program. This will archive the program even if memory is cleared. Then to access the program, go to mem and unarchive it.
Answer:
The equation needed is 
The cost per ream of paper = $4
Step-by-step explanation:
Here, the cost of 5 reams of paper = $ 21
The tax on her purchase = $1
So, the actual cost of 5 reams of paper = Total Cost paid - Tax amount
= $ 21 - $ 1 = $20
So, the actual cost of 5 reams of the paper is $20.
Now, to find out the cost of 1 ream of paper:
= $4
Hence, the cost of each ream of paper = $ 4.
9x-3y=3. |x3| 27x-9y=9
3x+8y=-17. |x9|27x+72y=-153
--------------------------------- -
-81y=162
y=-2
9x-3y=3
9x-3(-2)=3
9x+6=3
9x=3-6
x=-3/9
x=-⅓
x=-⅓
y=-2
<span>The sum of the interior angles of any regular polygon is (n - 2) X 180
30 = n
</span><span>[(30) - 2] × 180
</span>28 X 180
5040
<span>The interior angle of a regular polygon = the sum of interior angles ÷ number of sides</span>
5040 <span>÷ 30 = 168</span>
Therefore the measure of each interior angle in a regular 30-sided polygon is 168°
