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Umnica [9.8K]
3 years ago
14

Combine like terms. 0.5(×^4-7)+16=​

Mathematics
2 answers:
bazaltina [42]3 years ago
6 0
The answer is 0.5x^4+12.5
ANTONII [103]3 years ago
3 0
I wish I knew but someone will help you eventually
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Convert this mixed number to an improper fraction. 2 2/3
kotykmax [81]

Answer:

8/3

Step-by-step explanation:

Take the whole number and multiply it by the denominator. 2 * 3 = 6

Then add that to the numerator. 6 + 2 = 8

8 is your new numerator and 3 stays as the denominator.

Hope this helps!

6 0
3 years ago
Construct a confidence interval for p1-p2 at the given level of confidence.
Georgia [21]

Using the z-distribution, the 90% confidence interval for the difference of proportions is given by: (-0.0534, 0.0434).

<h3>What is the mean and the standard error for the distribution of differences?</h3>

For each sample, the mean and the standard error are given as follows:

  • p_1 = \frac{30}{235} = 0.1277, s_1 = \sqrt{\frac{0.1277(0.8723)}{235}} = 0.0218.
  • p_2 = \frac{39}{294} = 0.1327, s_1 = \sqrt{\frac{0.1327(0.8673)}{294}} = 0.0198.

For the distribution of differences, they are given by:

  • \overline{p} = p_1 - p_2 = 0.1277 - 0.1327 = -0.005.
  • s = \sqrt{s_1^2 + s_2^2} = \sqrt{0.0218^2 + 0.0198^2} = 0.0294

<h3>What is the confidence interval?</h3>

The interval is given by:

\overline{p} \pm zs

In this problem, we have a 90% confidence level, hence\alpha = 0.9, z is the value of Z that has a p-value of \frac{1+0.9}{2} = 0.95, so the critical value is z = 1.645.

Hence the bounds of the interval are:

\overline{p} - zs = -0.005 - 1.645(0.0294) = -0.0534

\overline{p} + zs = -0.005 + 1.645(0.0294) = 0.0434

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0
2 years ago
Find the three trigonometric..pls help due very soon
astraxan [27]

Answer:

sin 0 = 24/25

cos 0 = 7/25

tan 0 = 24/7

Step-by-step explanation:

hey there!

sine = opposite divided by hypotenuse

the opposite of angle 0 is 24 and the hypotenuse is 25 so sin 0 = 24/25

cosine = adjacent divided by hypotenuse

the adjacent of 0 is 7 and the hypotenuse is 25 so cos 0 = 7/25

Tangent.= opposite divided by adjacent

the opposite of 0 is 24 and the hypotenuse is 7 so tan 0 = 24/7

4 0
2 years ago
Find the critical value necessary to form a confidence interval at the level of confidence shown below.
Rzqust [24]

Answer:

the critical value for 0.87 level of confidence is 1.51

Step-by-step explanation:

Given the data in the question;

level of confidence = 0.87

now,

1 - c = 0.87

c = 1 - 0.87

c = 0.13

c/2 = 0.13/2 = 0.065

now

1 - c/2  = 1 - 0.065 = 0.935

so our level of significance ∝ = 0.935

Now, the critical value will be;

Z_{0.935 is obtained as follows;

P( Z < z ) = 0.935

so we find the value from ( standard normal distribution table )

P( Z < 1.51 ) = 0.935

Therefore, the critical value for 0.87 level of confidence is 1.51

8 0
3 years ago
Explain why 1/12+ 1/12+ 1/12is the same as 1/4.
Zigmanuir [339]

Answer:

1/4 = 3/12 = 1/12+1/12+1/12

Step-by-step explanation:

Because 1/4 equals 3/12.

6 0
3 years ago
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