Let's begin by listing out the information given to us:
There are four students: n = 4
Number of students to be selected: r = 2
To calculate the combination of 2 students to be chosen, we use:

Therefore, there 12 possible combinations from these
The answer is 4 1/2 (four and a half).
Answer:
a reflection and a dilation
Step-by-step explanation:
in the wording, it was stated that the triangle was reflected then dilated.
D would be the right answer
First off, you really don't need to write "what percent???" here.
25% of 80 is 0.25(80) = 20.