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Ksivusya [100]
3 years ago
9

Sally, Sue and Sara are friends. Sue's age is twice Sally's age. Sara is 1 year younger than Sue. The

Mathematics
1 answer:
sergiy2304 [10]3 years ago
3 0
Sue = 2 Sally
Sara = Sue - 1
= (2Sally) - 1
Sally + Sue + Sara = 49
Sally + 2 Sally + 2 Sally - 1 = 49
5 Sally = 49 + 1
5 Sally = 50
Sally = 10
Sue = 20
Sara = 19
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4.20. According to a report released by the National Center for Health Statistics, 51% of U.S. households has only cell phones (
Sergeu [11.5K]

Answer:

The probability that the household has only cell phones and has high-speed Internet is 0.408

Step-by-step explanation:

Let A be the event that represents U.S. households has only cell phones

Let B be the event that represents U.S. households have high-speed Internet.

We are given that 51% of U.S. households has only cell phones

P(A)=0.51

We are given that 70% of the U.S. households have high-speed Internet.

P(B)=0.7

We are given that U.S. households having only cell phones, 80% have high-speed Internet. A U.S household is randomly selected.

P(B|A)=0.8

\frac{P(A\capB)}{P(A)}=0.8\\P(A\capB)=0.8 \times P(A)\\P(A\capB)=0.8 \times 0.51\\P(A\capB)=0.408

Hence the probability that the household has only cell phones and has high-speed Internet is 0.408

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3 years ago
How many questions can i ask brainly without position for community if i have 4000 points.
Masteriza [31]

Answer:

Depends on how much you offer for an answer. Offer 10 points and you'll be able to ask 400 questions. Offer 20 points, I think around 200 questions.

4 0
3 years ago
Order the numbers from least to greatest 3 7/9 , 3.65 , 3.6
kvasek [131]

Answer:

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Step-by-step explanation:

you just have to make all of the numbers decimals or mixed fractions then it is very easy to order them.

7 0
3 years ago
Doug can paint the living room in 4 hours. it would take elaine 6 hours to paint the same room. how long would it take doug and
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2.4 hours

You can get this by setting up the equation:

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Where x is equal to the amount of hours spent working. In this equation x/4 would be Doug. In 4 hours he would paint on room. x/6 would be Elaine. When you add them together using common denominators, you can find x. 
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3 years ago
Select all that apply.
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10:4 15:6 20:6 if those aren’t on there I ain’t ur guy
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3 years ago
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