Answer:
4/b
Step-by-step explanation:
7/b - 3/b
Since the denominators are the same, we can subtract
4/b
Answer: the picture has no answer it's invalid but I will try:
X is a 90 degree angle other than that I can't do anything
Step-by-step explanation:
Answer: -1(xy) exact value = -xy
rewrite -1(xy) as -(xy)
Step-by-step explanation:
A.) Distribute the outside to each term
Remember, when you multiply exponents you add the numbers together
Answer:
B
Step-by-step explanation:
The screenshot given explains the formula of standard deviation, which measures the variation of numbers in a set.
It basically says we have to find the sum of all the numbers subtracted by the mean squared, and divide that by the number of data sets, and then square root.
The only way we can get this problem is by B.