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
Answer:
idk
Step-by-step explanation:
i wish i did
Answer:
y=-2x
Step-by-step explanation:
Answer: 53x^7
Step-by-step explanation:
Subtracting a negative is like adding.