A) "...different than..." - incorrect B) "...different than..." - incorrect C) CORRECT D) "... chemical composition ... terrestrial lava" - wrong parallelism E) I think that the usage of "lava's" to refer to its chemical composition is correct but the "co...

Parallelism:

... to pay of ... and to profit ...

B), C), D) can be eliminated.

I'm not sure whether the usage of "by using" in A) is wrong but "with" in E) is shorter and simpler.

So E)

Can someone please help me understand where the GrossProfit calculation could be simplified as follow:

GrossProfit = (k+60)*x-(kx+t) --> kx+60x-kx-t --> 60x-t

Thanks for helping.

This is how I solved it: there are 6 types of balls which summed are 25: white even white odd red even red odd blue even blue odd So: 25 = WE + WO + RE + RO + BE + BO We are asked probability of picking WE or WO or RE or BE Statement 1) WE = 0 insufficient Statement 2) WE + WO - WE - RE - BE = 0.2 A...

From the statement:
Z > ((10+x)/2)

From 2)
5x > ((10+x)/2) -> 10x > 10+x -> x > 10/9
That is not true as we only know that x > 0

Does the above make sense? Can we eliminate 2) base on that?

Thanks.

As we don't know the sign of the variables we cannot divide/multiply.

But can we do this?:

(X-Y-X-Y)/(X+Y) > 0

-2Y/(X+Y) > 0


Thanks.

Hi, I also get C) but with different method, could someone confirm whether it's correct. I simplified the inequality in the statement: 1/p > r/(r^2+2) 1/p - r/(r^2+2) > 0 (r^2+2-rp)/(p(r^2+2)) > 0 (r(r-p)+2)/(p(r^2+2)) > 0 ------------- 2) we only know that r/(r^2+2) is positive, nothing else -> INS...