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3 years ago

The x-intercept of 2x + 3y = 12

Mathematics

1 answer:

andrezito [222]3 years ago

8 0

Answer:

That would be the 2( and not because of the the x ) it would actually be 2/3x because when u solve it the u should get or I'm guess you should get

y= 2/3x+4

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8 is to 32 as 1 is to

kati45 [8]

Answer:

1 is to 4

Step-by-step explanation:

the factor is 1-4 meaning 32÷8 is 4 so having 1 would mean the other factor is 4

5 0

2 years ago

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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.

6 0

2 years ago

The graph shows the favourite colours chosen by some middle school students. Which statement is supported by the information in

ivanzaharov [21]

Answer:

A is incorrect. 34% of the students chose red, yellow, or orange.

Step-by-step explanation:

answer will be updated when more options are given.

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2 years ago

75% of 164 is _____________

zvonat [6]

Answer: 123 IS

Step-by-step explanation:

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2 years ago

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55 is 80% of what number? round to the nearest tenth, is necessary.

Sophie [7]

let the number = x

x*80/100 = 55

x = 5500/80

x=68.75

After rounding off, it will remain 68.75

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2 years ago