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3 years ago

One step equation for algebra 1 can someone help

Mathematics

2 answers:

Julli [10]3 years ago

4 0

15+m=34 -15. -15 M=19 N-12=-20 +12. +12 N=-8 V+16=8 -16. -16 V=-8 A-15=-5 +15. +15 A=10

Alinara [238K]3 years ago

4 0

2) m=19 4) n=−8 6) v=−8 8) a=10 Hopefully that helps you ❤

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The dollar-mart grocery stores sales six bars of soap for $1. how many soaps can a customer buy with $9.

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Answer:

Step-by-step explanation:

6 bars of soap = $1

x bars of soap = $9

We need to multiply both sides of the equation by the same amount so that $9 is on the right.

$1 x 9 = $9

6 x 9 = 54

So, you can buy 54 soaps with $9.

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2 years ago

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Answer:

189 components must be sampled.

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 $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Now, find the margin of error M as such

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

Assume that component lifetimes are normally distributed with population standard deviation of 16 hours.

This means that $\sigma = 16$

How many components must be sampled so that a 99% confidence interval will have margin of error of 3 hours?

n components must be sampled.

n is found when M = 3. So

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$3 = 2.575\frac{16}{\sqrt{n}}$

$3\sqrt{n} = 2.575*16$

$\sqrt{n} = \frac{2.575*16}{3}$

$(\sqrt{n})^2 = (\frac{2.575*16}{3})^2$

$n = 188.6$

Rounding up:

189 components must be sampled.

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