Is m+z>0

[goan81]

Is m+z>0

1). m-3Z>0

2). 4z-m>0

[Name User]

is m+z positive?

(1) m>3z
m=1, z=-2, => 1-2=neg
m=2 z=.5 => 2-.5=pos
insufficient.
(2) 4z>m
z=-1 m=-5 -5+-1=neg
z=1, m=.5 .5+1=pos
insufficient

1 and 2 combined, you get following inequality. 3z<m<4z. in order to satisfy this condition, z must be positive which in then makes m positive so m+z will be positive.
C

[goan81]

OA is C.

Thanks.

[CrackXam]

Another vote for C.

for m+z>0,
both must be +ve or lml > lzl and m must be +ve.

From stmnt 1 we get to know that m is +ve.
stmnt II states z is +ve.

So, C!

[nikiforos]

Another vote for C