The formula p=nc-e gives the profit p when a number of items n are each sold at a cost c and expenses e are subtracted. if p=5700, n=4000, and e=900. what is the value of c?

1.65

You can substitute in the values of p, n and e to get the equation:
5700 = 4000c - 900

add 900 to both sides and you get

6600 = 4000c

divide both sides by 4000 and you get

1.65 = c

so the answer is 1.65

Perimeter of the triangle is 48.

Step-by-step explanation:

First, you need to calculate all sides of the triangle. You know two of them and you can use Pythagoras Theorem for calculating the third side. Pythagoras Theorem is a²+b²=c²

Here, you know a and b. So 12²=144 ;  16²=256

144+256=400

Now, you need to find root.

√400=20

The third side (c) is 20.

Now you add up all sides.

20+12+16=48

I hope I helped! I will be glad, if you mark my answer brainliest