08/26/24

It seems like my child is missing core math abilities like adding and subtracting, etc- will they ever move past this and be able to do more advanced math?
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02/24/23

Given a description in words, prove a statement using strong mathematical induction.
Suppose bottled water is sold only in sets of 3 bottles and sets of20 bottles. Let P(n) be the statement “n bottles of water can be sold.” Provethat P(n) is true for every integer n ≥ 38.
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03/28/21

If a randomly sampled individual from this population tests positive, what is the probability that they actually have COVID-19?
Had COVID-19 but tested negative: 4Had COVID-19 and tested positive: 166Did not have COVID-19 but tested positive: 129Did not have COVID-19 and tested negative: 1,218Total adults tested in sample:... more
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03/28/21

Statistic and probably homework

The assets (in billions of dollars) of the four wealthiest people in a particular country are 32, 27, 24, 10. Assume that samples of size n=2 are randomly selected with replacement from this... more
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08/13/19

Question about reflection in geometry
Let C be a circle with center O and L a line. First, prove that if L goes through O, then the mirror image of L (except O) is L itself (except O). Now we assume that L is not going through O. Prove... more
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07/23/19

What is tan(x - pi/4)?
If sin x= 7/25, and 0 < x < pi/2, what is tan(x - pi/4)?
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06/26/19

Question in description

A motorcycle is idling in front of your house. Three more motorcycles arrive making the same amount of noise as the first. By how much has the decibel level outside of your house increased? ... more
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05/29/19

sum of squares of dependent gaussian random variables?
Ok, so the Chi-Squared distribution with n degrees of freedom is the sum of the squares of n independent gaussian random variables. The trouble is, my gaussian random variables are not... more
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05/22/19

Minimal polynomials and characteristic polynomials?
I am trying to understand the similarities and differences between the minimal polynomial and characteristic polynomial of Matrices. 1. When are the minimal polynomial and characteristic... more
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05/11/19

Are there any situations in which L'Hopital's Rule WILL NOT work?
Today was my first day learning L'Hopital's Rule, and I was wondering if there are any situations in which you cannot use this rule, with the exception of when a limit is determinable.
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04/25/19

Trigonometry, Find the exact value.
Find the exact value ofsin(θ/2) given sec θ = 5/3 and −90<θ< 0
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04/17/19

Please help I don't understand!!
in the equations listed, a, b, c, and d are all real numbers. Which of the equations would have solutions that are nonreal?a. ax^2 = bb. ax^2 + bx = 0c. ax^2 + bx + c = 0d. (ax + b)(cx + d) = 0e.... more
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03/27/19

Suppose f is one-to-one differentiable function...
Suppose f is one-to-one differentiable function and its inverse function f-1 is also differentiable. If f(1)=4 and f'(1)=5, find (f-1)'(4).
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03/22/19

How many tickets were sold?
There were 345 tickets purchased for a major league baseball game. The lower reserved tickets cost ​$9.50 and the upper reserved tickets cost ​$8.00 The total amount of money spent was $2809.50How... more
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03/22/19

Defining the derivative without limits?
These days, the standard way to present differential calculus is by introducing the Cauchy-Weierstrass definition of the limit. One then defines the derivative as a limit, proves results like the... more
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03/20/19

On what intervals is the function f(x) = 3/2x^(2/3) + x increasing or decreasing
i know how to get the critical # of -1, but not sure how to get x cannot equal 0 or how x being undefined at 0 comes from for this question, thanks
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03/20/19

Solve for X Y = 1/(1+exp(-.052*(X-95.63)))
I am stumped... mot a math fundi
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03/19/19

Inversion in Projective Geometry
1. Let C1 and C2 be two circles both passing through the point S. Let C1 be inside C2. Prove that you can construct a circle of inversion i such that I(C2) = C1.
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03/19/19

What is the easiest way to understand tensors for someone who understands linear algebra?
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03/15/19

Defining the derivative without limits?
These days, the standard way to present differential calculus is by introducing the Cauchy-Weierstrass definition of the limit. One then defines the derivative as a limit, proves results like the... more
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03/15/19

Difference between "I have got" and "I have gotten"?
I see these two expressions are used almost identically in different contexts. Is there a difference between *I have got* and *I have gotten*?
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05/26/16

Slope-intercept equation
Find the slope intercept equation of the line with slope -3, passing though point (1,-5). Enter the y-intercept only, as a numeric value.
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01/21/15

Are Problem, Please help its urgent !
There is a line through the origin that divides the region bounded by the parabola y = 4 x - 2 x^2 and the x-axis into two regions with equal area. What is the slope of that line?
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01/02/13

what is a straight edge
a sraight line is a line that has a one end point and a arrow that keeps going the other direction
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