6,964 Answered Questions for the topic mathematics
URGENT HELP PLEASE, Statistics Questions, please help!!
a) Create a scatter plot of time spent on the Internet versus timespent watching television, which is the independent (x) variable and dependent variable?
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External variable meaning, please help!!
What is "external variable" ? Please explain + provide examples.
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Urgent Help, Statistics Question, Linear Correlation
Which is the correct answer and explain why please. The answer for this was D. but I thought it was B. and I don't understand why. And what do they mean by "hidden variable," where does it usually...
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Solve: -5x^2 + 5 = -2x
The solution contains a reduced fraction ± another reduced fraction with a radical numerator. What is this fraction with a radical numerator?(A) ± (2√6 i)/5(B) ± (2√26)/13(C) ± (√26 i)/5(D) ±...
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Mathematics
06/09/21
Probability and statistics
How many four-letter permutations can be formed from The first five letters of the alphabet?
Mathematics
06/09/21
probability question
you have a bag of 17 marbles. four are blue, 6 are green, 2 are red, and 5 are yellow. what is the probability of drawing a red marble, keeping it, then drawing a blue marble?
06/09/21
Please help, what are the z-scores of these
1.Find the z-score close to 11.15 percentile.2. Find the z-score close to 25.18 percentile.3. Find the percentile z-score close to 48.27 percentile.4. Find the z-score close to 62.31 percentile.5....
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06/09/21
Hi! please help me solve my homework
The monthly income of the workers at the Microsoft plant are distributed normally. Suppose the mean monthly income is P30,000 and the standard deviation is P5,000. 20% of workers earn how much per...
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A plane in still air.
You are flying a plane from Toronto to Ottawa (N65E). The wind is coming from N20W at 60 km/h. What should your speed relative to the still air and heading be if you are to make the 500km trip in...
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06/08/21
Perpendicular Vectors
Determine a value of t so that vector u = [9,t] and vector v = [-16,t] are perpendicular.-Also, are projections of perpendicular vectors always 0? A friend stated that they were but that doesn't...
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06/08/21
Speed and Distance relative to still air
You are flying a plane from Windsor to Gatio (N65E). The wind is coming from N20W at 60 km/h. What should your speed relative to the still air and heading be if you are to make the 500km trip in 1h...
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Scalar Multiples
The angle between vector u and vector v is 60 degrees. If magnitude of vector u is 4 times the magnitude of vector v, find a scalar multiple, m, such that:vector u + m(vector)v is perpendicular to...
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Calculate angle DEF
Triangle DEF has vertices D(-3,5), E(2,3) and F(6,7). Calculate angle DEF.
Statistics Question Help!
a) Create a scatter plot of time spentwatching television versus number ofbooks owned.The x value or independent value is the number of books owned, and the y value or dependent value is the hour...
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Mathematics
06/08/21
Which pair of statements are logically equivalent? Select 2
Which pairs of statements are logically equivalent? Select two options.the inverse and the contrapositive of the original conditional statementthe original conditional statement and its...
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Mathematics
06/08/21
if s varies directly as the square of t, and s=128 when t=4, find s when t is 9.
Linear Law - Non linear equation
How to express the non-linear equationx2y + m = nx² in the form of Y=mX+c , where m and n are constants?
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06/08/21
Please help someone help me solve this
A Math test score is assumed tobe normally distributed with amean score of 50 and a standarddeviation of 10. If 45% of the students failed the test,what was the minimum passing score?
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06/08/21
On a given interval, if the antiderivative of f exists, is it unique? Why or why not? (You may cite theorems to support your answer.)
The question basically asks for a specific given interval, if the antiderivative of f exists, is it unique?If yes, why?If no, why not?In stating the reasons you can use specific theorems that would...
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06/08/21
Hi please help!
Sarah begins the year with $110 in her savings account. Each week, she spends $14. Martin begins the year with $8 dollars saved, but each week he puts $6 in an account. Let w represent the number...
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Mathematics
06/08/21
Write an exponential function in the form y=ab^xy=ab x that goes through points (0,17) and (5,4131).
Mathematics
06/08/21
Suppose that x=ln(A) and y=ln(B). Write the following expressions in terms of x and y (so you cannot have an A or B anywhere in your answers)
Answer the following problem: ln(A^4 x sqrt(b))
What is the maximum height the rocket reaches?
A rocket takes off from a height of 30 feet with an initial velocity of 150 ft/sec. The equation that models the path that the rocket takes is: (G)x = -16t^2 + 150t + 30. What is the maximum height...
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Mathematics
06/07/21
what if the sum of two was 17 and the difference was 1 what are the two numbers
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