If $$ {3\sqrt{{1-a}\over{a}}}+9={19-3\sqrt{{a}\over{1-a}}}$$, then what is the value of a?

The value of x in the given equation
$$ {23 ^2 + \sqrt{x}=625}$$

1-[5-{2+(-5+6-2)2}] is equal to 

The sum of the squares of 2 number is 146 and the square root of one of them is 5. The cube of the other number is 

Find the value of   $$ {(0.75)^3\over1-.75}+[0.75+(0.75)^2+1]$$

$$ (17)^{2} + 6 × (13)^{2}-212×6$$

The smallest number that must be subtracted from 1000 to make the resulting number a perfect square is 

$$\sqrt{x}÷ \sqrt{144} = 0.02, $$ then the value of x is