If `a/2 = b/3 = c/5` , find the value of `( a+ b + c ) : c`

If a/3 = b/5 = c/7 , then value of (a+ b+c)/b will be:

If   ( a -5 )^2 + ( b - c )^2 + ( c - d )^2 + ( b + c + d - 9 )^2 = 0 , then find the value of ( a + b + c ) ( b + c + d ) is

If a=-2, b=-3, c = 2 then find the value of (ab)/(c) + 9 ?

If a=2, b=3 and c=5 then find the value of a^3+b^3+c^3

If a=4, b=-3, c=2 , find the value of 4a^(2)+5b-12c ..

If a = 2 , b = -2 and c = 2 , then find the value of a^2b + b^2c + c^2a