2,563 Answered Questions for the topic Maths

Maths

11/05/20

Nine times a number decreased by four is 14
I need the best answer for i pass my exam
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Maths

11/04/20

8 divided by twice a number
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Maths

11/01/20

3 doughnuts and 2 cakes cost £7. 5 doughnuts and 4 cakes cost £13. what’s the cost of a doughnut? what’s the cost of a cake?
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Maths

11/01/20

A Board has 24 cm And 18 cm Breadth Find It's Perimeter
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Maths

10/28/20

Find the x-intercept ,y-intercept and slope for the line given below 7x-9y=-27
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Maths Math

10/27/20

Four brothers split amounts
A load of coal was divided between 4 four brothers the first received ⅓ the second received ⅖ the third received 1/7 and the fourth received 273 kgFind the original mass of coal and how much the... more
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Maths

10/26/20

the product of b and 3 is less than or equal to 27
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Maths Physics

10/25/20

Question in description
By Newton’s law of cooling, the instantaneous rate of cooling is proportional to the differencebetween the temperature of the coffee and the outside temperature. That is, dT/dm = -k(T-TO)where k is... more
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10/21/20

Set Theory and Lists
If A = {b, {b}, ∅} how would we use list notation to write {B: B ⊆ A and B ≠ ∅} If you could explain what I need to do to solve this that would be much appreciated.
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Maths

10/21/20

Find k such that f(x) = x^4 - kx^2 + kx+2 has the factor x -
please help, I can’t find the answer
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Maths

10/21/20

My number is odd it is a factor of 36 and a multiple of 4 what is it
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10/20/20

Boundedness of a Sequence

Question : How do we prove that the sequence (1+(1/n))^n is bounded?My thoughts on this question : We know that, to prove a sequence is bounded, we should prove that it is both bounded above and... more
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10/19/20

Michael rented a truck for one day. There was a base fee of 18.95 , and there was an additional charge of 76 cents for each mile driven. Michael had to pay 215.79 when he returned the truck.

For how many miles did he drive the truck?
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10/18/20

Convergence or Divergence of the Infinite Series of sin(n)
Hello, I have a question related to the convergence or divergence of an infinite series.Question : Test the convergence/divergence of the series sin(n), using a suitable test.My thoughts : So for... more
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Maths Trigonometry

10/17/20

how do I find integral of 3^tgx(tg^2x+1)

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10/15/20

The formulas give the cost in revenue functions for a company that manufactures and sells a certain product. Cost C(X)=16,000+11x; Revenue R(X)=19x. Determine the profit function for the company.
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10/14/20

Calculus Question
Find an equation of the parabola y = ax2 + bx + c that passes through (0, 1) and is tangent to the line y = 5x − 5 at (1, 0).
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10/14/20

Absolute Convergence
Show whether the series ((-1)^n)*((2^n)/(n^4))) is absolutely convergent.Taking an=((-1)^n)*((2^n)/(n^4))) , here |an|=((2^n)/(n^4)).I have the gut feeling that this is absolutely convergent. But... more
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10/12/20

Limits and Divergence/Convergence

Question :It is given that lim (an) n->infinity=a.Define bn=(a1+a2+…………+an)/nWhat can you say about the convergence of {bn}?
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10/12/20

Direct reasoning and indirect reasoning in math-2 alberta curriculum
A standard deck of 52 cards consists of 4 suits (hearts, clubs, diamonds and spades). If a student deals 3 cards from standard deck, determine the probability to the nearest hundredth, that at... more
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10/12/20

(0,5) is on the terminal arm of angle theta in standard position. Calculate sin theta.
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Maths Mathematics

10/10/20

Proof of set theory
How would I go about proving this question:Let A, B, C, D be finite sets with A⊆C and B⊆D. Proof that A×B⊆C×D
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10/10/20

Limit of a Sequence- Epsilon Delta Definition

Let an be a sequence of real numbers such that lim n-->infinity (an)=3.By directly using the definition of the limit of a sequence, show that lim n-->infinity(2an/(2an+3))=2
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10/09/20

What is wrong with this proof of finite sets?
Let A, B, C, D be finite sets with A⊆C and B⊆D. What is wrong with the following incorrect proof that A×B⊆C×D.Proof:Since A⊆C we have that |A|≤|C|. Since B⊆D we have that|B|≤|D|.We know that... more
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10/07/20

Maths - Lower Bounds & Upper Bounds(Real Numbers)
What is the upper bound of the infinite sequence 1/x^2, where xE{R\0}We know that x={1, 1/4, 1/9, 1/16,.....} Since all x here are greater than 0 or less than equal to 1.Can't we take 1 as an upper... more
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