Well percents are probability, and probability is similar to theory. So i think its theoritical probability.
Hope this helps.
Answer:
The perimeter of a shape is the sum of the measurements of all sides. Since a rectangle have equal lengths and widths, you can just add the numbers twice.
So, 15 + 15 + 8 + 8. So the perimeter is 46 cm.
The standard form of a line:

We have the equation of a line in the slope-point form:
use distributive property
add 3 to both sides
multiply both sides by 2
subtract x from both sides
change the signs

4y - y + 7y
4y - y = 3y
3y + 7y = 10y
10y is your answer
hope this helps