A, b and c can do a work in 20,30 and 60 days respectively. if b and c a in every 3 days, when can a finish the work?
12 days
15 days
16 days
18 days

16 days so in short c i just my brother with this test

step-by-step explanation:

c. he organized a political resistance group based on islam.

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?