A country produces only apples and bananas. Moving from point A to point B along its production possibilities frontier, 5 apples are gained and 4 bananas are forgone. What is the opportunity cost of an apple?A. 4/5 of a bananaB. 1 appleC. 5/4 of a bananaD. 4 bananasE. none

A. 4/5 of a banana

Step-by-step explanation:

Given that a country produces only apples and bananas.

Moving from point A to point B along its production possibilities frontier, 5 apples are gained and 4 bananas are forgone

i.e. preferences for 5 apples are equal to 4 bananas

5 apples = 4 bananas

Let us calculate unit rate i.e. how much 1 apple is equivalent to.  this would give the opportunity cost, namely the cost of gain of 1 apple

1 apple= banana

Hence opportunity cost = 4/5

i.e. Option A is right

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.