It's actually A. Regardless of what angle x is, B is always the midpoint on AC and hence also the mid point in terms of height, so its height is 20. To prove it I drew two lines from B to D and E. Now, CEB and BDA are identical because they have two equal angles (<DAB=<EBC=x, <ECB=<DBA=90-x) and an ...

Answer choice is E. At a first glance you can see that both statements have x^2 so they cannot really say anything about the polarity (+/-) of x. (i) plug in x=2 or x=-2 to get n^3(1-4)<0 or (n^3)(-3)<0; n can be positive so the statement holds, but we don't know whether x is neg or pos. (ii) x^2-1<...

That's a weird one... where did u get it? imo it's B. If religious people had to take a day off every seventh day, rather than once a week, the system would work for the first year but then while everyone takes a one-day gap, they are still counting. Therefore, in the first year their day off would ...

imo it's E. While B could be correct, it involves assuming that no other country would offer a lower price (like country Z or something). E will always be true because it's not a conclusion about actions but about states. If S < D (at the beginning) then 1.25 S < 1.25 D. In other words, if both coun...

I think it's E, but it's more like something I remember rather than fully understand. The comparison between irradiating food and cooking it is misleading because some foods get both and suffer a double effect, so the similarities do no justify irradiation.

Losing the modifiers at the start and end, this sentence is constructed in the following manner: Phyllis Wheatley's bending of A, B, and C suggests her range and depth of influences. In this case, the correct AC should end with suggests to agree with bending (singular), which is the subject. So I th...