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3 years ago

Which expression is equivalent to 4/9 (2n - 3)? Please explain

Mathematics

1 answer:

serg [7]3 years ago

5 0

Answer:

n=3/2

Step-by-step explanation:

4/9 (2n - 3)

8/9n-4/3=0

8/9n=4/3 (multipluy by 9)

8n=12

n=12/8 which simplifies to 3/2

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Nadusha1986 [10]

2(x+4)=18

2•x + 2•4 = 18

2x + 8 = 18

2x + 8 = 18
- 8 -8
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3 years ago

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Ashton used 12.6 gallons of gasoline to drive his car on a weekend trip. he averaged 21.5 miles per gallon. about how many miles

7nadin3 [17]

Answer: 270.9 miles.

Step-by-step explanation:

The formula we use here is :

$\text{Distance=Speed * Number of gallons of gasoline}$

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3 years ago

A manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular binding ma

IrinaVladis [17]

Answer:

538 books should be tested.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many books should be tested to estimate the average force required to break the binding to within 0.08 lb with 99% confidence?

n books should be tested.

n is found when $M = 0.08$

We have that $\sigma = 0.72$

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.08 = 2.575*\frac{0.72}{\sqrt{n}}$

$0.08\sqrt{n} = 2.575*0.72$

$\sqrt{n} = \frac{2.575*0.72}{0.08}$

$(\sqrt{n})^{2} = (\frac{2.575*0.72}{0.08})^{2}$

$n = 537.1$

Rounding up

538 books should be tested.

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3 years ago

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Iteru [2.4K]

You will divide 50 by 10 to get 5. Then multiply 5 by 50 to get 250

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ollegr [7]

The Answer is :$1,213.13

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