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3 years ago

PLS HELP GIVING BRAINLIST

Mathematics

1 answer:

babymother [125]3 years ago

7 0

Answer:

the answer is y = - ½ ...............

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The sales tax in your city is %8.8, point, percent, and an item costs \$63$ before tax.

Flura [38]

Answer:

$68.54

Step-by-step explanation:

7 0

3 years ago

Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t

SVEN [57.7K]

Answer:

The minimum sample size required is 207.

Step-by-step explanation:

The (1 - α) % confidence interval for population mean μ is:

$CI=\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

The margin of error of this confidence interval is:

$MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

Given:

$MOE=3\\\sigma=29\\z_{\alpha /2}=z_{0.01/2}=z_{0.05}=2.576$

*Use a z-table for the critical value.

Compute the value of n as follows:

$MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=2.576\times \frac{29}{\sqrt{n}} \\n=[\frac{2.576\times29}{3} ]^{2}\\=206.69\\\approx207$

Thus, the minimum sample size required is 207.

3 0

3 years ago

What is three eights divided by 24

Arturiano [62]

The answer is 1/64 because you do 3/8 ÷ 24/1 then you

flip and it will be 3/8 ÷ 1/24 you can cross cancel

24 go's into three 8 times so the answer is 1/64s.

Hope I helped!

7 0

3 years ago

-1/2+ 7/8- 1/10 Hint: rational numbers

ki77a [65]

After solving $-\frac{1}{2}+\frac{7}{8}-\frac{1}{10}\\$ we get $\frac{11}{40}$

Step-by-step explanation:

We need to solve the following expression:

$-\frac{1}{2}+\frac{7}{8}-\frac{1}{10}\\$

Solving the above expression we need to find the LCM of denominators: 2,8,10

The LCM of 2,8,10 is 40

$-\frac{1}{2}+\frac{7}{8}-\frac{1}{10}\\=\frac{-1*20+7*5-1*4}{40}\\=\frac{-20+35-4}{40}\\=\frac{11}{40}$

So, after solving $-\frac{1}{2}+\frac{7}{8}-\frac{1}{10}\\$ we get $\frac{11}{40}$

Keywords: Rational Numbers

Learn more about Rational Numbers at:

#learnwithBrainly

3 0

3 years ago

Each of the 23 students in ms Evans class raised $45 for the school by selling coupon books. How much money did the class raise.

charle [14.2K]

1035....multiply it..............

5 0

3 years ago

Read 2 more answers