To which subsets of R do the followings belong? `sqrt7`,3/5,0,15,-6,10

Which of the following is quadratic equation: x^2+sqrt3x+sqrt5=0

Find the median of the following numbers:5,7,11,8,9,6,13,10

Find the nth terms of the following sequences. 3,7,11,15,…..

Solve the following equation (9x)/(7-6x)= 15

Test which of the following is solutions of 6x^2-sqrt2x-2=0 i) -sqrt2/3 ,ii) -sqrt2 ,iii) 1/sqrt2 ,iv) sqrt(2/3)

Test which of the following is solutions of x^2+3x-180=0 i)12,ii)10,iii) -15 ,iv) -18

Find the values of x for which the following are defined : sqrt(3-x)+sin^-1((3-2x)/5)

Find the co-factor of a_12 in the following : |(2,-3,5),(6,0,4),(1,5,-7)| .

Find the mean of the following data 1,2,3,4,5,6,7,8,9 and 10

Find the value of x + y from the following equation. 2 [{:(x, 5),(7, y -3):}] + [ {:(3, -4),( 1, 2):}] = [{:(7, 6),( 15, 14):}]