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3 years ago

HELP PLZZ!!!!!!!! Look at this equation: 2 H2 + O2 --> 2 H2O. Why isn't there any coefficient in front of oxygen?

Mathematics

2 answers:

Nostrana [21]3 years ago

7 0

All of them are correct

HACTEHA [7]3 years ago

4 0

Answer:

D. All of these

Step-by-step explanation:

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How do u find the two missing angles?

Strike441 [17]

Knowing that m=n, n is also 37
Now, we know a triangles angles all add up to 180
Add up the two known angles, n and m
37+37=74
180-74=106
O=106 n=37

4 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

A delivery service charges $1.25 for

choli [55]

Answer: $6\ \text{miles}$

Step-by-step explanation:

Given

A delivery service charge $\$1.25$ for each delivery

and an additional $\$0.75$ for each mile traveled

Suppose, x miles are covered

The charge is given by

$\Rightarrow 5.75=1.25+0.75x\\\Rightarrow 4.5=0.75x\\\Rightarrow x=6\ \text{miles}$

Therefore, driver traveled 6 miles for delivery

8 0

3 years ago

Which equation can be used to find one-tenth of 119.9

mel-nik [20]

To find one tenth of 119.9 just divide 119.9 by 10

3 0

3 years ago

1. In Brad's golf bag, he has 4 times more white golf balls than yellow golf balls. He has 20 white golf balls in his bag. Which

erma4kov [3.2K]

The answer is C, the equation is 4y = 20

6 0

3 years ago

Read 2 more answers