If (3a+2b) : (5a+7b) = 1:2 , then find a : b.

If (3a+7b)/(3a-7b)= 4/3 then find the value of the ratios (3a^2-7b^2)/(3a^2+7b^2)

If (3a+7b)/(3a-7b)=(4)/(3) then find the value of the ratio (3a^(2)-7b^(2))/(3a^(2)+7b^(2))

Is g={(1,1),(2,3),(3,5),(4,7)} is a function from A={1,2,34,} . to B={1,3,5,7}? If this is given by the formula g(x)=ax+b, then find a and b.

if a : b = 5 : 3 , find (5a + 8b) : (6a - 7b) .

If A = diag. [3,-5,7]^* and B - diag. [-1,2,4], then find (2A + 3B).

If a : b = 3 : 5 , find : (10a + 3b) : (5a +2b)