Three positive numbers are in the ratio of 11 : 12 : 15. If the sum of the squares of those numbers is 1960, then the sum of the numbers is

Value of

Find the value of. 67²–33².

Given that 10^0.48 = x, 10^0.70 = y and x² = y², then the value of z is close to

If a-b=10 and ab=-21, then what is the value of a³-b³?

If x = 2 then the value of is:

If a = 2.234, b = 3.121 and c = –5.355, then the value of is

Given k = -3. Find the value of .