Answer: c. E2 - 21
Step-by-step explanation:
difference means to subtract
Now, e squared=E² and twenty-one=21
Therefore the difference of e squared and twenty-one is E2 - 21
Answer:
50,803,200 ways
Step-by-step explanation:
In this situation, since you should alternate girl-boy or boy-girl, the line-up can either start with a boy or a girl kicking which would yield one of the two following patterns:
BGBGBGBGBGBGBG or GBGBGBGBGBGBGB.
For each of those patterns, there are 7! ways to arrange all boys and 7! ways to arrange all girls. The number of ways that a line-up can be made for one round of kicking is:

There are 50,803,200 ways to set the line-up.
Answer:
9
Step-by-step explanation:
4x9=36
5x9=45
6x9=54
7x9=63
(:
So firstly, multiply both sides by 4 (the reciprocal of 1/4): 
Next, subtract both sides by 2 and your answer will be: 
No Maria is wrong because if you look at placement value you would see 4 is in the one hundred thousands place.