05/28/21

Calculus - Trigonometry

The curve y = sin(x) + cos(x) has two points where the tangent line is horizontal on the interval . The y co-ordinates of these points is the positive and negative square root of a positive... more
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05/27/21

geometry question
Write the equation of a circle if the ends of the diameter are (17, -12) and (5, -4).
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05/27/21

ASAP USE A CALCULATOR AND CLEARLY WRITE ANSWER
Let the region R be the area enclosed by the function f(x)=e^x and g(x)=5x+1. If the region R is the base of a solid such that each cross-section perpendicular to the x-axis is a square, find the... more
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05/27/21

Find the standard form of the equation of the ellipse with the given characteristics. Vertices: (0,4), (8,4); minor axis of length 10.
Find the standard form of the equation of the ellipse with the given characteristics.Vertices: (0,4), (8,4); minor axis of length 10.
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05/26/21

Roots of a polynomial
How would I find the zeros of the polynomial g(x)=x^4-2x^3-3x^2+5x+2.I've simplified the expression to (x-2)(x^3-3x-1), am I missing something?
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05/26/21

Statistics (3rd Year) - Special Topic (Bayesian statistical methods)
Suppose that the proportion of defective items θ in a large manufactured lot is unknown and the prior distribution of θ is Uniform(0,1) distribution. Items are selected at random from the lot one... more
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05/26/21

The sum of the first five terms in an arithmetic sequence is −40. If 𝑎9=16, find the common difference.
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05/26/21

How do you use the double angle formula to rewrite 4-8sin^2x?
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05/26/21

I found the answer I just need to find the strategy I would use for it (strategies below the problem)
Donna bought a book for $10 and then spent half her remaining money on a train ticket. She then bought lunch for $4 and spent half her remaining money at a bazaar. She left the Bazaar with $8. How... more
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05/25/21

The prior odds were a hundred-to-one against Voldemort surviving. What is the probability of Voldemort being alive??
Dumbledore is worried if Voldemort is still alive because he noticed a suspicious mark on a hand.If Voldemort dies, the mark continuous to exist with a 20% probability.On the other hand, if... more
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05/24/21

limits question
i need help finding these limitslimx→0 : -2 sin 3xlimx→0 : 4cos2x
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05/24/21

Proving Hyperbolic Identities
Prove that: cosh6 x - sinh6 x=4, where sinh 2x=2
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05/22/21

How do you find the center of the circle with a radius of 5, tangent to the line y = x and the x-axis?
Assume the center is in the first quadrant.
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05/22/21

How do you find the equation of a circle that is tangent to both the x and y-axes and is tangent to the line 3x + 4y = 60 at the point (8,9)?
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05/22/21

Random variables
The discrete random variable X has the following probability distribution:x -2 0 1 3 4P(X=x) 0.2 0.1 p 0.1 q(i) Given that E(X)=1.7 , find the... more
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05/21/21

Please i need an answer to the following probabilities

Roll a fair die repeatedly. Let X be the number of 6’s in the first 10 rolls and let Y the number of rolls needed to obtain a 3. (a) Write down the probability mass function of X. (b) Write down... more
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05/21/21

Find the equations of the straight lines passing through the origin that are tangent to the circle of the center (2, 1) and radius 2
Find the equations of the straight lines passing through the origin that are tangent to the circle of the center (2, 1) and radius 2
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05/21/21

Probability question (2)
Three marbles are randomly drawn from a bag containing six white marbles balls and four black marbles.Part a) What is the probability of there being: 3 white marbles. Round your answer to the... more
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05/21/21

Sequences and series
Let P be the tangent plane to the surface z = x2 + 2y2 at the point Q= (-1, -1,3). Which of the following points also lies in P?(a). (-1,0,1)(b) (-1,0,-1)(c). (0,-1,-1)(d). (0,-1,2)the answer is... more
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05/21/21

Find the probability
Find the probability of getting 2 boys in selecting 3 people from 4 boys and 3 girls. The answer must be rounded off to two decimal places.
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05/21/21

What is the y-coordinate of the y-intercept of the line that passes through the points (–4, –4) and (4, 8)?
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05/21/21

PLEASE HELP, COLLEGE TRIGONOMETRY! Find the sine, cosine, and tangent of angle θ .
Λ28 /. \ 28 / . θ \ 48sinθ= ?cosθ= ?tanθ= ?
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05/20/21

good explanation needed!

correct me if I'm wrong would this decrease ???
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05/20/21

good explanation needed! please help

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05/20/21

statistics and probability
The demand of replacement of windscreens at a certain garage occurs randomly at an average rate of 10 per week. 11 Determine the probability that not less than 3 windscreens are demanded in a week.... more
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