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Line segment QU is a median of triangle UVW. Find QV, if QV = 7x–1 and QW = 4x+5
General
3 months ago
the sum of two numbers is 35. the second number, y, is equal to 4 times the first number , x. which system of linear equations represent the two numbers?
General
3 months ago
Jorge tiene 5 veces la edad de su hijo dentro de 15 años, tendrá únicamente el doble de la edad de su hijo ¿cuantos años tendrá su hijo dentro de 15 años ?
General
3 months ago
Ravish tells his daughter Aarushi, "Seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be"..If present ages of Aarushi and Ravish are x and y years respectively, represent this situation algebraically as well as graphically
General
3 months ago
The Bio Pharm company has developed a stress test for college-aged students. Scores on the stress test for such students are approximately normally distributed with a mean of 55 points and a standard deviation of 2 points. Scores of 58 points or higher indicate a high level of stress and are of concern to doctors. A random sample of college-aged students will be selected, and each will be given this stress test. Answer the following questions based on the information given.(a) What is the probability that the score for the first randomly selected student will be at least 58 points? (show your work)(b) Given that the first randomly selected student has a score of at least 58 points, what is the probability that the next randomly selected student scores below 58 points? (show your work) (c) For each randomly selected sample of six college-aged students variable Y yields the number of students in the sample with a high level of stress (a score of at least 58 points.) What kind of a variable is Y? (clearly circle your answer) A) Normal variable with a mean of 55 and a standard deviation of 2. B) Normal variable with a mean of 55 and standard deviation of 12 (6 students times 2).
General
3 months ago
Suppose that Fred, a United States politician from a large western state, wants to create a new law that would require children under the age of 16 to be accompanied by an adult at all times in public places. Based on previous voting records, Fred believes that he could gain the support of 25 % of likely voters. To test his hypothesis, Fred conducts a random survey of 1200 likely voters and asks if they would support his proposition. Let ???? denote the number of likely voters in Fred's sample that pledge their support, assuming that Fred's belief that 25% of likely voters would support his proposal. Which of the following statements are true about the sampling distribution of ???? ?O The sampling distribution of X is exactly normal with u = 0.5 and a = 0.0125. " The sampling distribution of X is exactly binomial with in = 1200 and p = 0.25. O The sampling distribution of X is exactly normal with u = 300 and a = 15. 0 The sampling distribution of X is approximately normal with a = 0.5 and o = 0.0125. 0 The sampling distribution of X is approximately normal with u = 300 and os = 15. O The sampling distribution of X is approximately binomial with n = 1200 and p = .. 25
General
3 months ago
Suppose that the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1 month. 19 randomly selected people were asked what age they learned to walk. Round all answers to two decimal places. A. xBar~ AND( , ) B. For the 19 people, find the probability that the average age that they learned to walk is between 11.5 and 12.5 months old. C. What is the probability that one randomly selected person learned to walk when they were between 11.5 and 12.5 months old
General
3 months ago
Determine the following areas under the standard normal (z) curve: (Round your answers to four decimal places.) (a) To the left of −1.29 (b) To the right of 1.29 (c) Between −1 and 1 (d) To the left of 0 (e) To the right of −6 (f) Between −1.7 and 2.5 (g) To the left of 0.23
General
3 months ago
Time varies inversely with speed if the distance is constant. It takes James 4 hours to get to his destination when he travels at 65 miles per hour. How many minutes would he have saved if he drove the same distance 15 per hour faster?
General
3 months ago
Triangle X Y Z is shown. Angle X Z Y is a right angle. Angle Z X Y is 60 degrees and angle X Y Z is 30 degrees. The length of hypotenuse X Y is 4. Given right triangle XYZ, what is the value of tan(Y)? One-half StartFraction StartRoot 3 EndRoot Over 3 EndFraction StartFraction StartRoot 3 EndRoot Over 2 EndFraction StartFraction 2 StartRoot 3 EndRoot Over 3 EndFraction
General
3 months ago
A rocket is launched into the air and follows the path, h(t) = -3t^2 + 12t, where t is time measured in seconds. Determine how long it takes the rocket to hit the ground. Show all work for full credit.
General
3 months ago
The graph of a proportional relationship passes through (12, 16) and (1, y) . Find y
General
3 months ago
Which of the following best describes the set of numbers?-1, 2, -4, 8, ...Infinite arithmetic seriesFinite geometric seriesInfinite geometric seriesInfinite alternating sequence
General
3 months ago
A class of 40 students elected a class president. There were 12 votes for Candidate A, and 18 votes for Candidate B. The remaining students in the class did not vote. Which expression gives the percent of voters who voted for Candidate A?
General
3 months ago
What is the value of log6 1/36?
General
3 months ago
A box of 6 trophies costs 5$. How much would it cost to buy 48 trophies ?
General
3 months ago
After a week of rain, tadpoles appeared in your pond. After t minutes, you have (7t + 5) tadpoles and your friend has (8t – 3) tadpoles. a) Write an expression that represents the number of tadpoles you and your friend caught together?b) Who have more tadpoles after 9 minutes?
General
3 months ago
Victoria has a 2 pound package of flour. She uses 2/5 of the flour to make a pizza. She then uses 3/10 of the remaining flour to make bread. Find the weight of the package of flour that she has left.
General
3 months ago
Explain how to use basic facts and number patterns to find 5,600 divide by 7
General
3 months ago
The average temperature at the South Pole is – 47º F. The average temperature on the Equator is 86º F. How much warmer is the average temperature on the Equator than at the South Pole?
General
3 months ago
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