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3 years ago

Please help i want to keep my kitten.

Mathematics

2 answers:

harkovskaia [24]3 years ago

7 0

Answer:

A number that multiplies a variable in a term is known as a coefficient.

Given the term: 6x^3, we can identify three parts:

The coefficient, 6, is the constant that is being

multiplied by the variable.

The variable, x, is a number with an unknown

value, or with multiple potential values.

The exponent, 3, is the power with which the variable is being raised to.

Dafna11 [192]3 years ago

3 0

A coefficient is a number multiplied by a variable

So yes the other guy is right

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Find the measure of

Bingel [31]

Answer:

I feel like its 75 degrees and also are u in 8th and have u done power quotient and product rule before if so I need help

8 0

3 years ago

Of 1000 randomly selected cases of lung cancer, 823 resulted in death within 10 years.

Arada [10]

Answer:

a) $0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799$

$0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847$

The 95% confidence interval would be given by (0.799;0.847)

b) $n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79$

And rounded up we have that n=622

c) $n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

Step-by-step explanation:

Part a

$\hat p=\frac{823}{1000}=0.823$

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.823 - 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.799$

$0.823 + 1.96\sqrt{\frac{0.823(1-0.823)}{1000}}=0.847$

The 95% confidence interval would be given by (0.799;0.847)

Part b

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And on this case we have that $ME =\pm 0.03$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

And replacing into equation (b) the values from part a we got:

$n=\frac{0.823(1-0.823)}{(\frac{0.03}{1.96})^2}=621.79$

And rounded up we have that n=622

Part c

$n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11$

And rounded up we have that n=1068

5 0

3 years ago

Is the expression 2 • 4' equal to the expression 8x?Explain your answer

Mamont248 [21]

Answer:

Yes

Step-by-step explanation:

If your expression is 2*4 it will equal 8 and if your still not sure divide 8 by 4 and your answer is 2 or 8 by 2 and you'll get 4.

3 0

4 years ago

Simplify each expression:

likoan [24]

I'm a little rusty, but I'll do what I can!

-21x -19 =

x +2 =

11.8 + 2.6y =

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3y + 115 =

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8 0

3 years ago

Increase by 40% (write the decimal multuplier)

DanielleElmas [232]

Answer: 0.040

Step-by-step explanation:

6 0

3 years ago