The sum of two numbers is 23 and their difference is 5. Let the two numbers be x and y.
Write two equations and solve them to find the two numbers

y = 9

x = 14

Step-by-step explanation:

1st equation ⇒ x + y = 23

2nd equation ⇒ x - y = 5

1st equation - 2nd equation;

(x + y) - (x - y) = 23 - 5

x + y - x + y = 18

2y = 18

y = 18/2

y = 9

Substitute above solution in the 1st equation to find x;

x + y = 23

x + 9 = 23

x = 23 -  9

x = 14

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

12.5 feet

step-by-step explanation: