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torisob [31]
2 years ago
12

Which of the following is a valid application of the distributive property?

Mathematics
2 answers:
Anna35 [415]2 years ago
7 0

Answer:

Only A

Step-by-step explanation:

Be is not distrubitive property and a is opening the parenteses

goldenfox [79]2 years ago
7 0
The last one is correct! ONLY A
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2:5=_:10=_:15=_:20=_:25= 12:_
ivolga24 [154]

Answer:

4, 6, 8, 10, 30

Step-by-step explanation:

5 0
3 years ago
Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random
Katen [24]

Answer:

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

Step-by-step explanation:

Given

n = 200

x_1 = 34 -- City C

x_2 = 54 --- City K

Required

Determine the 90% confidence interval

This is calculated using:

CI = \bar x \± z\frac{\sigma}{\sqrt n}

Calculating \bar x

\bar x = \bar x_1 - \bar x_2

\bar x = \frac{x_1}{n} - \frac{x_2}{n}

\bar x = \frac{34}{200} - \frac{54}{200}

\bar x = 0.17 - 0.27

For a 90% confidence level, the ​z-score is 1.65.  So:

z = 1.65

Calculating the standard deviation \sigma

\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }

So:

\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }

\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}

So:

CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}

CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}

7 0
2 years ago
Felicia put $8500 into a CD that pays 2.8% interest compounded semiannual. According to the rule of 72, approximately how long w
maksim [4K]
<span>25.7 years The rule of 72 is a simple approximation on how long it will take to double your money. You simply divide 72 by the interest rate and you'll have your estimate on the number of years it will take. So 72 / 2.8 = 25.7 years. To demonstrate that it's just an estimate, you can take the log of 2 and divide by the log of 1.028 to get the exact value. This far more complicated calculation gives the result of 25.1 years. And to be honest, the estimate of 25.7 years is more than close enough for such an quick and easy rule of thumb.</span>
5 0
2 years ago
Write and Solve an area problem that illustrates the use of the find the pattern strategy
d1i1m1o1n [39]
An area is when you multiply the height by the base. So, it depends on the picture and its numbers.            ---------------------
 For example:                             /        6in          /
                                             5in/                        /
                                                 /                        /        model number: 5 in×6in=30 in
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8 0
3 years ago
Read 2 more answers
What is the area, in square feet, of the shape below?<br> 8.6 ft:<br> 8.7 ft
Gekata [30.6K]

Area of a triangle = 1/2 x base x height

Area = 1/2 x 8.7 x 8.6

Area = 37.41 square feet

4 0
2 years ago
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