This is the isosceles right triangle, the diagonal of a square, the thing that so upset the Pythagoreans. The two sides and diagonal of a square are in ratio
so we get

We could have also gotten this using Trig:


Or by recognizing u=v because remaining angle is 45 so this must be isosceles so



Normal price for 5 pages: number of pages times the price per page
(5)*($8.75) = $43.75
Discounted rate: $8.75 - $1.45 = $7.30
Discounted price for 5 pages:
(5)*($7.30) = $36.50
Answer:
5
Step-by-step explanation:
this is what I do, I see how many times 20 can go into 100, that is 5 times. and sense the mystery numbers 20% is 1, you can just leave it at 5. To double check your answer, count 1 5 times. 1 goes into 5 5 times, and 20 goes into 100 5 times.