If `a + 2b + 3c = 20 and 2a + 4b + c = 25`, then c = ______

If 2a = 3b = 4c , then a : b : c will be

If 2A = 3B = 4C, then A : B : C = ?

If 2A = 3B = 4C then A : B : C = ?

Simplify : ( 2a - 3b + 3c ) ( 4a + 2b - c )

The points - a + 4b - 3c, 3a + 2b + 5c, -3a + 8b - 5c, -3a + 2b + c are

If A = {1,2,4}, B = {2,4,5} , C = {2,5} , then (A - C ) xx (B - C) is equal to

If a+b+c=0 and a^2+b^2+c^2=1, then (a) a b+b c+c a=1/2 (b) a b+b c+c a=-1/2 (c) a^4+b^4+c^4=1/2 (d) a^4+b^4+c^4=3/2

(i) If 3A = 4B = 6C , find : A : B : C . (ii) If 2a = 3b and 4b = 5c , find: a : c .

Add: 3a - 4b + 4c, 2a + 3b - 8c, a - 6b + c