Answer:

Step-by-step explanation:
step 1
<u>Find the area of the pizza</u>
The area of a circle is equal to

we have

substitute

step 2
we know that
A
diameter has
calories per square inch
By proportion
Find how many calories are in the entire pizza
so

<span>so to factor the trinomal:
z^2+18z+81
In this problem 9*9=81 and 9+9=18, so insert 9 as the right hand term of one factor and 9 as the right-hand term of the other factor.
(z+9)(z+9)
Combine the two common factors of (z+9) by adding the exponents.
(z+9)^2</span>
Let n = number
9n + 4 = - 77
9n = - 81
n = - 9
Your number is - 9.
because the x values are identical the radius would be found by subtracting the y values.
6-2 = 4
the radius is 4