I think that this is the reason for A being correct: Average = Sum/(numbers in set) Sum of numbers in S = Ave(S) * (number of numbers in set S) Sum of numbers in T = Ave(T) * (number of numbers in set T) It is given that Sum(S)=Sum(t). Thus, Ave(S) * (number of numbers in set S) = Ave(T) * (number o...

1) I think you got the question wrong. Anyway, lets try a) x^4 = 1 b) x^3 = 27 c) x^2 = 16 d) 2<=|x| <=5 e) 2<= 3x + 4 <= 6 a) X = +/- 1, which means X is two points and not a line b) X = +3, which means X is a point at 3 and not a line c) X = +/- 4, which means X is two points and not ...

Six countries in a certain region sent a total of 75 representatives to an international congress, and no two countries sent the same number of representatives. Of the six countries, if Country A sent the second greatest number of representatives, did Country A send at least 10 representatives? (1)...

RonPurewal Wrote:together:
because the triangle is equilateral, r = 60.
the angle at Y is an inscribed angle, so the intercepted arc XZ measures 120 degrees.
this arc is therefore 1/3 of the circle.
the circle's circumference is therefore 3 x 18.
sufficient.

Isn't the circle's circumference 18*3\2=27?