Hello!
This is a question about multiplying to get a polynomial answer.
Here we can use two strategies, which will get you the same strategy.
One is using a Punnett Square, and the other would be FOILing.
I personally like Punnett Squares, but I will use FOILing for the sake of being online.
FOIL stands for First, Outside, Inside, Last, which describes how the terms should be multiplied.
Let's multiply the first terms.
(-d + e)(4e + d)

The outside terms.
(-d + e)(4e + d)

The inside terms.
(-d + e)(4e + d)

The last terms.
(-d + e)(4e + d)

Now you just add them together to find the polynomial.


There are three terms in the product, and the product is degree 2, since the highest degree of the equation (the highest power any term is raised to) is 2.
Hope this helps!
The answer is D. It can't be considered a funtion unless each X value only has 1 Y value corresponding to it. In this problem, you see the X value 3 paired with -1 and 1.
SAME: Both measure a circle
DIFFERENT: Circumference measures AROUND the circle and the area measures the entire circle.
SOLUTION
From the image in the question, we can see that it is a right triangle problem.
And we can use the Pythagoras theorem to solve for the length of cable wire needed.
Pythagoras theorem states that:

![\begin{gathered} x^2=16+9 \\ x^2=25 \\ \text{Take the square roots of both sides:} \\ \sqrt[]{x^2}=\sqrt[]{25} \\ x=5ft \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20x%5E2%3D16%2B9%20%5C%5C%20x%5E2%3D25%20%5C%5C%20%5Ctext%7BTake%20the%20square%20roots%20of%20both%20sides%3A%7D%20%5C%5C%20%5Csqrt%5B%5D%7Bx%5E2%7D%3D%5Csqrt%5B%5D%7B25%7D%20%5C%5C%20x%3D5ft%20%5Cend%7Bgathered%7D)
Final Answer:
A cable of length 5 feet is needed.