B. (k+10f)(k-5f) you can tell in 2 ways. 1. if the second sign is neg then the signs in the factors are going to be one neg and one positive so that knocks out C and D. Then you look at the second term and since the 5 is positive then the 10 has to be positive so you end up with a positive 5kf.
The second way is to FOIL them out. When you check B you get

combine your like terms and you have your original expression of

Hope that helps
Answer: 3/13
Step-by-step explanation:
There are 12 cards above the jack in a deck of 52 cards
Probability = 12/52 = 3/13
Answer:
Early college provides high school students the ability to get a sneak-peak into what college is like as a whole. Credits, professors, homework, campus and friends don't need to be intimidating topics anymore.
Step-by-step explanation:
I Hope This Helps! Good Luck!
Answer:
672
Step-by-step explanation:
a+b / 2 times h