F(x)= x exponent 2 - 8x+5 find f(-1)

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

Graph y = -|x| + 2. click on the graph until the correct one appears.

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48