Brenda and her best friend went on a vacation together. They both paid for a flight, and Brenda had a fancy room for $150 per night, for a total of $1,500. Her friend had a smaller room for $120 per night, for a total of $1,320.Part AWrite and solve a system of linear equations to find the cost of the flight, x, and the number of nights on their vacation, y. Complete the equation for Brenda's costs first.______x + ______y = _____________x + ______y = _______The flights were $___ each, and they stayed ___nights.Part BIf a third friend joined them and stayed in a mid-range room for $130 per night, how much would her vacation cost?

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general 10 months ago 3107

A 2003 study of dreaming found that out of a random sample of 106 ​people, 80 reported dreaming in color.​ However, the rate of reported dreaming in color that was established in the 1940s was 0.21. Check to see whether the conditions for using a​ one-proportion z-test are met assuming the researcher wanted to test to see if the proportion dreaming in color had changed since the 1940s.1. What is the normal approximation method appropriate for this test?2. compute appropriate test statistic.3. At a 0.10 level of significance, what are the critical values for the test.4. what Is the appropriate decision and conclude for the test at 0.10 level of significance (fail to reject, reject Ha)5. would your conclusion change if the test were to be conducted as an upper tailed test? why or why not supporting your answer using the p-value approach.

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general 10 months ago 1147

telephone company charges a fixed monthly rate plus a rate per megabyte of data used. The company charges $120 for 100 megabytes of data and $95 for 50 megabytes of data. An equation can be written to show the relationship between the total megabytes of data used (x) and the total monthly charges (y). Which of the following best describes the steps to draw the graph? Draw a graph that joins the points (100, 120) and (50, 95) and has a slope = 0.50 Draw a graph that joins the points (100, 120) and (50, 95) and has a slope = 2 Draw a graph that joins the points (120, 100) and (95, 50) and has a slope = 2 Draw a graph that joins the points (120, 100) and (95, 50) and has a slope = 0.50

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general 10 months ago 5962