For the following questions answer them individually
The total cost of 8 buckets and 5 mugs is 92 and the total cost of 5 buckets and 8 mugs is 77. Find the cost of 2 mugs and 3 buckets.
If $$\frac{a}{1-a}+\frac{b}{1-b}+\frac{c}{1-c}=1$$ then the value of $$\frac{1}{1-a}+\frac{1}{1-b}+\frac{1}{1-c}$$
If $$(x-3)^2+(y-5)^2+(z-4)^2=0$$, then the value of $$\frac{x^2}{9}+\frac{y^2}{25}+\frac{z^2}{16}$$ is
What number must be added to the expression $$16a^{2} -12a$$ to make it a perfect square ?
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