Xy = 940

and 

Cost = 5(2x) + 5y + 10y (I chose y to be the side with brick). The cost equation simplifies to: 

C = 10x + 15y 

Replace y in the cost equation with 940/x: 

C = 10x + 15(940/x) 

C = 10x + 14100/x <---this is the equation you need to minimize. 

C' = 10 - 14100/x^2 

10 - 14100/x^2 = 0 

14100/x^2 = 10 

x^2 = 14100/10 = 1410 

x = sqrt(1410) = 37.55 

y = 25.03 <---this is the length of the brick fence.

4 0

3 years ago

Azul has 4 green picks and no orange picks you add orange picks so that there are 2 orange picks for every 1 green pick how many

tino4ka555 [31]

Answer:

There would be 12 total picks.

Step-by-step explanation:

In order to find this, create a proportional equality in which the top of the equation is the number of orange picks and the bottom is the number of green picks.

2/1 = x/4

Now we cross multiply to find out the total number of picks.

1*x = 4*2

x = 8

Now that we have the number of orange picks, we add to the number of green picks for the total number.

4 + 8 = 12

3 0

3 years ago