The results of a survey of 41 students and the foreign language they are studying are shown in the two- way frequency table.
Language
Gender Chinese French Spanish Total
Girl
3
9
14
26
Boy
2
2.
11
15
Total
5
11
25
41
What fraction of the surveyed students are taking Chinese?
of the surveyed students are taking Chinese.

b. f(x) = –√x + 3this is the correct answer

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?