I think 13 pounds for extras and all not sure just my thought :)
B for 8 would be 6.2
b for 9 would be 7
The b is adding 0.8 each time
Hope this helps!
The function is y = -x^2 - 6x - 13.
The domain is the set of x-values for which the funcion is defined.
In this case, y is defined for all the real numbers.
Answer: all real numbers.
ANSWER

EXPLANATION
The polynomial function has zeros at:
-8,-1 and 3
This means the polynomial can be factored as:

We expand the last two factors:

We expand further to get:


The polynomial in descending powers of x is said to be in standard form.
This requires 2 pints of oil.
Using a proportion to solve this, we have:

Cross multiplying, we have
1/2*10 = (2 1/2)*x
5 = (2 1/2)x
Divide both sides by 2 1/2:
5÷(2 1/2) = (2 1/2)x÷(2 1/2)
2 = x