exam Maths Puzzle Numerical Ability

An objective function is to be maximized given the following constraints: x + 2y<- 4, x - y <-1, x >- 0, y >- 0. Find the vertices of the set of feasible solutions.

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exam Other Question

If n is any negative number, which of the following must be positive?

(A) n/2
(B) 2n
(C) n + 2
(D) n - 2
(E) 2 - n Please help me solve this: Clifford "TI" Harris went on a weekend trip. He averaged 35mi/h in the city and 60mi/h on the highway. If the 150mi trip took 3hrs, how much of the time was he driving in the city.