Answer: 12650
Step-by-step explanation:
It can be done in C25 4 = 25!/(25-4)!/4!= 25!/21!/(2*3*4)=
=22*23*24*25/24=22*23*25= 12650 variants
Only raul has correctly identified a base and corresponding height..... the remaining haven't.....
in the case of mark he's incorrect because any side can be the base but what matters is that the base must always be perpendicular to the height
in kiki's case... she's wrong because what she identified is the slant height... not height
I think its B cause it make more sence to analyze the two groups and calculate the diffrence
Answer: C) (9x^4-x^3-x)/5
