EXPLANATION
Let's consider the facts:
Discount price= 15% = 0.15 (in decimal form)
t=list price
A.
If there is a 15% price discount, so the table is selling at 100-15=85%
Then, the first equation representing the discount price is:
Now, as the discount on the table is 15%, the selling cost of the table would be:
Second equation -->
B.
1-->For first equation, the cost of the table after giving the discount has been calculated.
2--> For the second equation, the list price minus the discount amount is calculated.
C. Jenna sees a smartphone on sale for 1/4 off its list price.
Price of the smartphone at Top Quality =1/4 * list price
Price of the smartphone at Big Value= 75%=3/4 * list price
Jenna should buy the smartphone from Top Quality as it is at a lesser price.