When are the absoulte value and the oppposites of a rational number equal

The opposite of a number is sometimes equal to the opposite of the absolute value of the number. When the number is positive or 0, the statement is true.

Step-by-step explanation:

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