Sale price = $60
Discount = 20%
Regular price = $60/0.8 = $75
Answer:
23
Step-by-step explanation:
just trust me
6 1/4 :) Is this correct?
Using Lagrange multipliers, we have the Lagrangian

with partial derivatives (set equal to 0)




Substituting the first three equations into the fourth allows us to solve for

:

For each possible value of

, we get two corresponding critical points at

.
At these points, respectively, we get a maximum value of

and a minimum value of

.
Search it up, you’ll get some answers. it maybe work