All categories

3 years ago

Please solve this for me -16y=96

Mathematics

1 answer:

VikaD [51]3 years ago

8 0

this is a answer

Step-by-step explanation:

y=96/-16

y=-6#

You might be interested in

Mr. Smythe needs gas for his car. If he spends $81 for 27 gallons, how much did he pay per gallon?

eimsori [14]

$3 dollars per gallon

6 0

2 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

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:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

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 $1 - 0.075 = 0.925$ , so Z = 1.44.

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.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

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

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

7 0

3 years ago

An office supply company manufactures paper clips, and even tolerates a small proportion of those paper clips being ‘defective’

vovikov84 [41]

Answer:

0.104 (10.4%)

Step-by-step explanation:

$UCL = \bar{p}+z(\sigma)$

$\sigma = p(1-)) Vn = 1.02(1-202)) 5$ = 0.028

$\thereforeUCL = .02+(3x0.028)$ = 0.104

$\thereforeUCL$ = 10.4%

4 0

4 years ago

Yolanda paid for her movie ticket using 28 coins, all nickels and quarters. The ticket cost $4. Which system of linear equations

Anvisha [2.4K]

Answer:

n + q = 28 0.05n + 0.25q = 4

3 0

3 years ago

Read 2 more answers

Please help me I don’t understand

andrezito [222]

angle 5 and angle 4 are exterior angles

7 0

3 years ago