Expert Assistance in Solving College-level Math Problems

College

Show that $A \cap B = A B$ if A and B are ideals of the unity-containing commutative ring R.

Tolnaio 2020-12-09

Suppose that R is a commutative ring and $| R | = 30$ . If I is an ideal of R and $| I | = 10$ ,demonstrate the maximum ideality.

Emeli Hagan 2020-12-09

Solve $x^{3} y + x^{2} y - 2 x y + 2 y = x^{3} \ln x$

lwfrgin 2020-12-09

The equivalent polar coordinates for the given rectangular coordinates: $[\begin{array}{cc} 5 & 180^{\circ} \end{array}]$

CoormaBak9 2020-12-09

You want to know whether people in different regions of the country are equally likely to vote Sarah Duterte, Peter Cayetano, Mar Roxas, or any candidate other than the three in the next election. You would use
A. chi-square test of independence.
B. either chi-square test (goodness-of-fit or test of independence), depending on how you set up the problem.
C. chi-square goodness-of-fit test.
D. both chi-square tests, in order to check the results of one with the other.

chillywilly12a 2020-12-09

For a population with a mean of $μ = 100$ and a standard deviation of $σ = 20$ ,
Find the X values.
$z = - .40$ .

naivlingr 2020-12-07

Understanding the Concepts and Skills
Suppose that, for a sample of pairs of observations from two variables, the linear correlation coefficient, r , is negative. Does this result necessarily imply that the variables are negatively linearly correlated? Explain.

geduiwelh 2020-12-07

If the annual percentage yield is 5%, what will $10,000 be worth 4 years form now?

Khaleesi Herbert 2020-12-07

Make a scatterplot of the data with two new points added.
a) $10 %$ return, 25 new birds.
b) $40 %$ return, 5 new birds.
Find two new correlations: for the original data plus Point A and for the original data plus Point B.

Wribreeminsl 2020-12-07

Sketch a graph of the function. Use transformations of functions when ever possible. $f (x) = - \frac{1}{4} x^{2}$

OlmekinjP 2020-12-07

If a high school graduating class has 128 students, 52 of them are on the honor roll, and 48 of them are attending college, the likelihood that a student selected at random from the class will not be attending college and making the honor roll may be calculated. The number of students who are not on the honor roll is 76, out of these 56 are going to college.

Falak Kinney 2020-12-07

Hypothesis Testing Review
For each problem below, simply identify the null and alternative hypotheses. Use appropriate notation/symbols. You do not have to run any hypothesis tests, although its

ringearV 2020-12-07

Evaluate the integral.
$\int \frac{\sin^{- 1} x}{\sqrt{1 - x^{2}}}$

Yasmin 2020-12-07

Solve the second order linear differential equation using method of undetermined coefficients
$3 y^{″} + 2 y^{'} - y = x^{2} + 1$

Khadija Wells 2020-12-07

Solve the linear equations by considering y as a function of x, that is, $y = y (x)$ .
$\frac{d y}{d x} + \frac{y}{x} = \frac{\cos x}{x}, y (\frac{π}{2}) = \frac{4}{π}, x > 0$

Emeli Hagan 2020-12-07

Find the particular solution of a non-homogeneous equation using Laplace transformation,
$y (0) = 0,$
$y^{'} (0) = 0,$
$y " (0) = 0$
$y^{‴} - 5 y^{″} - 22 y^{'} + 56 y = 12 - 32 e^{- 8 x} + 2 e^{4 x}$

Jaden Easton 2020-12-07

Would you rather spend more federal taxes on art? Of a random sample of $n_{1} = 86$ politically conservative voters, $r_{1} = 18$ responded yes. Another random sample of $n_{2} = 85$ politically moderate voters showed that $r_{2} = 21$ responded yes. Does this information indicate that the population proportion of conservative voters inclined to spend more federal tax money on funding the arts is less than the proportion of moderate voters so inclined? Use $α = 0.05 .$

a) State the null and alternate hypotheses.

$H_{0} : p_{1} = p_{2}, H_{1} : p_{1} > p_{2}$

$H_{0} : p_{1} = p_{2}, H_{1} : p_{1} < p_{2}$

$H_{0} : p_{1} = p_{2}, H_{1} : p_{1} \neq p_{2}$

$H_{0} : p_{1} < p_{2}, H_{1} : p_{1} = p_{2}$

b) What sampling distribution will you use? What assumptions are you making? The Student's t. The number of trials is sufficiently large. The standard normal. The number of trials is sufficiently large.The standard normal. We assume the population distributions are approximately normal. The Student's t. We assume the population distributions are approximately normal.

c)What is the value of the sample test statistic? (Test the difference $p_{1} - p_{2}$ . Do not use rounded values. Round your final answer to two decimal places.)

d) Find (or estimate) the P-value. (Round your answer to four decimal places.)

e) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level alpha? At the $α = 0.05$ level, we reject the null hypothesis and conclude the data are statistically significant. At the $α = 0.05$ level, we fail to reject the null hypothesis and conclude the data are statistically significant. At the $α = 0.05$ level, we fail to reject the null hypothesis and conclude the data are not statistically significant. At the $α = 0.05$ level, we reject the null hypothesis and conclude the data are not statistically significant.

f) Interpret your conclusion in the context of the application. Reject the null hypothesis, there is sufficient evidence that the proportion of conservative voters favoring more tax dollars for the arts is less than the proportion of moderate voters. Fail to reject the null hypothesis, there is sufficient evidence that the proportion of conservative voters favoring more tax dollars for the arts is less than the proportion of moderate voters. Fail to reject the null hypothesis, there is insufficient evidence that the proportion of conservative voters favoring more tax dollars for the arts is less than the proportion of moderate voters. Reject the null hypothesis, there is insufficient evidence that the proportion of conservative voters favoring more tax dollars for the arts is less than the proportion of moderate voters.

sagnuhh 2020-12-07

Equations of lines Find both the parametric and the vector equations of the following lines. The line through (0, 0, 1) in the direction of the vector $v = ⟨ 4, 7, 0 ⟩$

nagasenaz 2020-12-06

Solve $d \frac{d^{2} y}{d t^{2}} - 8 d \frac{d y}{d t} + 15 y = 9 t e^{3 t} w i t h y (0) = 5, y^{'} (0) = 10$

djeljenike 2020-12-06

Discuss the importance of data modeling.

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College

College Math Questions: Expert Solutions & Tips