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Leya [2.2K]
3 years ago
6

What would this problem be factored to ? a^2-b^2

Mathematics
1 answer:
frozen [14]3 years ago
7 0
The answer is
(a-b)(a+b)
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Explain how counting number of girls in five children family can be treated as a binomial experiment. What assumptions are neces
Juliette [100K]

This is a binomial experiment and you'll use the binomial probability distribution because:

  1. There are two choices for each birth. Either you get a girl or you get a boy. So there are two outcomes to each trial. This is where the "bi" comes from in "binomial" (bi means 2).
  2. Each birth is independent of any other birth. The probability of getting a girl is the same for each trial. In this case, the probability is p = 1/2 = 0.5 = 50%
  3. There are fixed number of trials. In this case, there are 5 births so n = 5 is the number of trials.

Since all of those conditions above are met, this means we have a binomial experiment.

Some textbooks may split up item #2 into two parts, but I chose to place them together since they are similar ideas.

8 0
3 years ago
The area of a square is 321 square feet. Which best represents the length of a side?​
sdas [7]
The side length is about 17.916

7 0
2 years ago
PLEASE HELP! I NEED TO GET THIS DONE SOON!
tensa zangetsu [6.8K]

Answer:6

Step-by-step explanation:

In a circle, a radius perpendicular to a chord bisects the chord. So BC = CA BC = 6 (given) x (or AC) = 6 Answer = 6. Tell me if I was right. Thanks.

6 0
3 years ago
Read 2 more answers
A motorboat travels Downstream on a river for 5 hours. The speed of the current is 2 km/h. The river flows into a still Lake and
lara [203]

Answer:

I think it is 10 km/hr

Step-by-step explanation:

5 hrs = 40 more with 2 km/hr current

2 hrs= less 40 no current

40-2x5=30

30 without current for three hours

30/3=10 km/hr no current

CHECK

10x2=20

10x5=50+2x5=60

8 0
3 years ago
⦁ Find the distance between the two numbers
liraira [26]

-12, 19=31

-2,-7=5

25,-1=26

8 0
3 years ago
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