Answer:
$13.25
Step-by-step explanation:
The correct answers for x would be

.
In order to find this, we must first get the equation to equal 0. In order to do that, subtract 1 from each side to get the following.
11

- 4x - 1 = 0
Knowing this we can now use the quadratic equation using a = 11, b = -4 and c = -1. The quadratic equation is below.

Now we can plug the values into the equation to solve.

Then simplify using the order of operations.

.
X^2 - 4x - 12
x - 6
x +2
If L equals to x + 2 than W will equal to x - 6
11
(9, 18, 27, 36, 45, 54, 63, 72, 81, 90 and 99)
Those numbers divisible by 9 are the multiple of 9; thus need to know how many multiples of 9 there are between 1 and 100:
100 ÷ 9 = 11 r 1 ÷ last multiple of 9 is 11 × 9 (= 99)
→ There are 11 - 1 + 1 = 11 numbers between 1 and 100 which are divisible by 9.
(They are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.)