Answer:
a)
![{x}^{2} - 16 \\ = {x}^{2} - {4}^{2} \\ = (x + 4)(x - 4)](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%2016%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20-%20%20%7B4%7D%5E%7B2%7D%20%20%5C%5C%20%20%3D%20%28x%20%2B%204%29%28x%20-%204%29)
b)
![{9y}^{2} - 25 \\ = {(3y)}^{2} - {5}^{2} \\ = (3y + 5)(3y - 5)](https://tex.z-dn.net/?f=%20%7B9y%7D%5E%7B2%7D%20%20-%2025%20%5C%5C%20%3D%20%20%20%7B%283y%29%7D%5E%7B2%7D%20%20-%20%20%7B5%7D%5E%7B2%7D%20%20%5C%5C%20%20%3D%20%283y%20%2B%205%29%283y%20-%205%29%20)
here is the answer hope that will help you
Answer:
The length is 22.1
Step-by-step explanation:
5.2 + 5.2 + 22.1+ 22.1 = 54.6
Answer:
the real size, 20 km, by
2.5
/1 Then, 20 x 2.5=50. So the answer is 50 km
Step-by-step explanation:
The unknown is how many girls and boys are in the class.
Answer:
shoulda woulda coulda been B
Step-by-step explanation: