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2 years ago

A bike cost 129.90 what is your total with a tax of 5%

Mathematics

1 answer:

cricket20 [7]2 years ago

6 0

Answer:

so you just use the equation to get the formula and extract the common denominator

Step-by-step explanation:

because i said so

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A random sample of 8 recent college graduates found that starting salaries for architects in New York City had a mean of $42,653

ycow [4]

Answer:

C. (36337.32, 48968.68)

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:

$\alpha = \frac{1-0.95}{2} = 0.025$

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 $1-0.025 = 0.975$ , so $z = 1.96$

Now, find 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.

$M = 1.96*\frac{9114}{\sqrt{8}} = 6315.68$

The lower end of the interval is the sample mean subtracted by M. So it is 42653 - 6315.68 = 36337.32.

The upper end of the interval is the sample mean added to M. So it is 42653 + 6315.68 = 48968.68.

So the correct answer is:

C. (36337.32, 48968.68)

3 0

2 years ago

Steven is buying a new mountain bike on layaway for $324. If he pays $36 each week how many weeks will it take steven to pay for

Reptile [31]

Answer:

9 weeks

Step-by-step explanation:

324/36 = 9

4 0

2 years ago

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5 + x/2 =4 please help

gizmo_the_mogwai [7]

Answer:

Step-by-step explanation:

x=3

8 0

2 years ago

Y – 1 = 2(x – 2), solve for y

solmaris [256]

Answer:

y = 2x-3

Step-by-step explanation:

y – 1 = 2(x – 2)

Distribute

y-1 =2x-4

Add 1 to each side

y-1+1 = 2x-4+1

y = 2x-3

6 0

2 years ago

Convert .2 to a fraction

shepuryov [24]

.2 converted to a fraction would be 1/5

3 0

2 years ago

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