Answer:
Step-by-step explanation:
7 choose 2 or
=7! / (7-2)!
=7*6*5*4*3*2*1 / 5*4*3*2*1
=7*6
=42
1. It is extracted from the ground.
2. It took years to form.
Correct ~~~~~~~~~~~~~~~~~~~~~~
Answer:
A prime numbers are numbers which have only two factor
The boundary line should be solid because it have a 'great/less than or equal to' sign