Mental Math: If a module contains 100 squares and 90 of the squares in the model are being used What is the percentage of those squares ?

90% are being used out of 100%.

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