Let f(x, y) = 1 + xy − 2x + y and let D be the triangular region in double-struck R2 with vertices (−2, 1), (−2, 5), and (2, 1). Find the absolute maximum and minimum values of f on D. Give all points where these extreme values occur. (Order your answers from smallest to largest x, then from smallest to largest y.)

ddsf

step-by-step explanation:

dfs

answer: i'm not sure

step-by-step explanation:

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh