1. A cyclist travels 56 miles in 4 hours. What is the cyclist's speed in feet per MINUTE?

20.5 feet per second

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

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value