Playing cards with friends you're dealt the cards A, 2, 3, 4, 5 all of the same suit. What is the probability that this would happen?

the answer is 9 because the question is telling how much it be together.

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?

the answer is c.

perimeters = 3√10/5

areas = 90/25

i got it down chief.

25/32 is the simplest form