Answer:8x-5y
Step-by-step explanation:
(3x-4y)-(-5x+y)
Remove brackets
3x-4y+5x-y
Collect like terms
3x+5x-4y-y
8x-5y
Answer:
The answer is -8
Step-by-step explanation:
(3)(-4)=-12 (-2)(-2)=4
Answer:
24 trees per acre
Step-by-step explanation:
Let x be the optimal tree density per acre and y be the number of bushels yield per tree
Since for each unit change of x from 28 trees/acre, we have 2 unit change of y from 40 bushels per tree in the reversed direction
Change of x from 28 is x - 28
Change of y from 40 is y - 40
Therefore we have y - 40 = -2(x - 28) or y = 40 - 2(x - 28) = -2x + 96
The total bushels per acre should be y bushels/tree * x tree/acre. We want to optimize this. Substitute the above equation in for y and we have


To find the maximum value of this, we can take the first derivative and set it to 0



We know this is a maxima because
. So T is maximum when x = 24 trees per acre
Answer:
c
Step-by-step explanation: