Which of the following examples has a unit rate of 9 feet per minute? Select all that apply. A) 81 feet in 9 minutes B) 108 feet in 12 minutes C) 36 feet in 4 minutes D) 45 feet in 9 minutes E) 63 feet in 7 minutes

answers

\3. yes the presentation (i.e. odd numbers being written as differences of two squares) is possible for all odd natural number however the presentation may not be unique. for example,  57=112−82=292−28257=112−82=292−282.

\4. 2 can't be written as a difference of two squares because 4-1=3 and 1-1=0 and the difference of squares grows to integers larger that 3.

can i get some in proving questions 1 and 2?

i am so sorry , i have no idea but i want points so i won't be a beginner anymore