The scale factor would be -8 because...
126 inches / 7 inches = 8 inches.
Because the car is bigger than the scale, it would be a negative scale factor.
Hi there!
The answer is:
-8i -32i
-40i is the answer.
Not addition, since

and 0 doesn't belong to the set.
Not subtraction, since

.
It is closed under multiplication. The set appears to contain all non-zero multiples of 3.
Not division, since dividing some of the numbers results in rationals which do not belong to the set.
What other operations are you supposed to consider?
Divide 560,444 by 350
<span>560,444/350 = 1601
(This number was actually a decimal but you can't order decimal amount of paint so we round!)</span>
This will be a 4th degree polynomial. Our root of x = 7 in factorization form is (x-7). Our root of x = -11 in factorization form is (x+11) and the last one is a complex number. According to the conjugate root theorem, if we have 2+8i, we also HAVE to have 2-8i. In factorization form that first one is (x-(2+8i)) which simplifies to (x-2-8i). Its conjugate in factorization form is (x-2+8i). Now we will FOIL all that out. Let's start with the (x-2-8i)(x-2+8i). That multiplies out to

. We have to combine like terms here to shorten that a bit.

. i^2 is equal to -1, and -1(64) = -64. Now we have

. That is

. Now let's FOIL in another factorization.

. That comes out to

. One more term to go!

. That, finally, is

.