Answer:
y=6
Step-by-step explanation:
Differentiate the equation
dy/dx=2x-8
Find the value of x in equation form
2x-8=0
x=8/2=4
Now x=4 is the line of symmetry or the parabola of the quadratic equation.
Plug back x=4 into the equation to find the turning point(minimum value)
y=(4)²-8(4)+22
y=16-32+22
y=6
Notice that in the expression n - 8,
the eight is the thing being subtracted.
We could read it like this: "Eight subtracted from a number."
So we can immediately see that the last option is not correct. It's the opposite of what we want. The third option is the same as the last, just worded differently: The number 8, decreased by a number n.
The second option is correct: A number n, but eight fewer than that.
n - 8
He needs to buy 4.5 packages of footballs because 4 is equal to 16 and half of four is 2 add them together you get 18
The surface area is 480 :)
