Y = x + 5
Just add 5 to the number of hours to get the total cost.
There are three things you have to know:
- A function is convex when its second derivative

- A function is concave when it second derivative

- The derivative of a power,
, is 
So, the first derivative is

and the second derivative is

This implies that the second derivative of a parabola is constant, and of course that 2 doesn't change the sign of
.
Answer:
16
Step-by-step explanation:
Let's call the liters x. We can write 0.15x + 0.4 * 4 = 0.2 (x + 4). When we solve for x we get x = 16 liters.
Answer:
Angle DE seams to be the same as DAE so it's 91°
Answer:
AFC
Step-by-step explanation:
because an acute triangle is a triangle less than 90 degrees. And the triangle AFC was less than