Find the value of `1+2-3-4+5-6+7+8-9`.

A transverse wave of frequency 250 Hz is travelling with a speed of 180 m/s. The path difference between any two point is x xx 10^(-2) m. When two points are 30^(@) out of phase. Find the value of x. {:(0,1,2,3,4,5,6,7,8,9),(,,,,,,,,,):}

The fundamental frequency of a closed organ pipe is 256 Hz. If the pipe is cut in two halves, then the difference in fundamental notes produced by two pipes is x xx 128 Hz. Find the value of x. {:(0,1,2,3,4,5,6,7,8,9),(,,,,,,,,,):}

Find the value of Min[(1#2) $ 3, 4#(5$6)] $ Max (6#7), (7#8)] :

Find the value of x , [ [3, 4],[5, 6]] + [ [2, 1],[x, 1]] = [ [5, 5],[8, 7] ]

Find the value of if the mean of the following distribution is 7.5. 3 5 7 9 11 13 6 8 15 8 4

if U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, B = { 2, 4, 6, 8} and C = {3, 4, 5, 6} then find the value of (B - C)'.

If U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, B = { 2, 4, 6, 8} and C = {3, 4, 5, 6} then find the value of B nn C' .

If U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, B = { 2, 4, 6, 8} and C = {3, 4, 5, 6} then find the value of (B -C)' .

Find the value of (log_(3)4)(log_(4)5)(log_(5)6)(log_(6)7)(log_(7)8)(log_(8)9)

Let the five observations are 1,3,8,x,y and their mean is 5 and variance is 9.2 find the value of (x)/(y) (a) 9:4 (b) 6:7(c)5:8(d) none