Answer:
20 and -20
20^2 = 400
(-20)^2=400 since two negative is positive
Answer:
or 
Step-by-step explanation:
The given equation is

Let us treat this as a quadratic equation in
.
where 
The solution is given by the quadratic formula;

We substitute these values into the formula to obtain;





or 
or 
or 
or 
For 21 Oz, price is 2.94
So, for 1 Oz, it would be: 2.94 / 21 = 0.14
In short, Your Answer would be $0.14 cereal per oz.
Hope this helps!
Answer:
the awnser should be. 165