Pretty sure you just add 80% and 20% to get 100%, hope this helps....
You have to add all the scores and dived by the 20 students, the result is 65.85%
Answer:
They use the same triangle but in different sizes to make the big triangle.
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given the expression

Simplify

Given that x = 1+√2
Substitute

Answer:
D. 8
Step-by-step explanation:
See the picture for steps