-2/3 divided by (-1/2)

4/3

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1  1/3

Step-by-step explanation:

The way I learned it was to use "Keep, Change, Flip" (or KCF). It is basically "Keep" the first number (-2/3), "Flip" the sign (division symbol), and Flip the second fraction (-1/2) (switch the numerator and denominator).  Then you multiply what is left, simplify, and you are done! I hope this helped.

the least common denominator is 40

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints