If A varies directly with B and C both , then show that A varies directly with (B-C) .

If a + b varies directly with a - b, then which of the following vary directly?

Three quantities A, B, C are such that AB = KC, where K is a constant. When A is kept constant, B varies directly as C, When B is kept constant, A varies directly as C and when C is kept constant, A varies inversely as B. Initially, A was at 5 and A : B : C was 1 : 3 : 5. Find the value of A when B equals 9 at constant C.

If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct? (A+B)alpha Cb.(A-B)alpha backslash(1)/(C)backslash c.sqrt(AB)alpha backslash C d.(A)/(B)= constant

If n varies directly as m, complete the following table :

A varies directly with B when C is constant and inversly with C when B is constant.A=6 when B=2 and C=3. What is the value of A when B=3 and C=18?

If y varies directly as x and y=12, where x=c, what is y in terms of c when x=8 ?