circles is
A. 3:4 B. 4:5 C. 7:5 D. 6:5 E. 1:4
- If x is 2/3 of y and y is 3/4 of z , then the ratio of z to x is
A. 2:1 B. 1:1 C. 3:2 D. 1:2 E. 4:3
.If a2+2ka +16 is a perfect square , then k=…..
A.-2 B.2 C. -4 D. 8 E. 16 - If x2+2x-24 =(x-a)(x-b), when a>b , then
A. a=4,b=-6 B. a=6, b=-4 C. a=6 ,b=4 D. a=6, b=-6 E. a=-4, b=-6 - The solution set the system of equation x2-8x+y=0, y=2x is
A. {(0,0),(12,6)} B. {(0,0),(6,12)} C. {0,12
Calculate the formulae of the following compounds.
(i)Nitrogen oxide which contains 63.64%by weight of nitrogen.
(ii)Iron oxide in which the weight of iron is 70