Find the smallest integer value of n for which 120n is a perfect square.
My answer is n = 7.5
Is it correct?
If not, could you please show me your workings? I want to learn, thanks.
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(a) y is inversely proportional to x^2. It is known that y = 10 for a particular value of x. Find the value of y when the value of x is halved.
My answer is 20, correct?
If not, can show m...
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Hi all
Belive me the numbers given below are related with one another.. but i dnt know what is the relation they hav.. there must b some calculation..
if any one can sove this for me.. it ...
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hey dudes
i studied mechanical engineering and found vb a great tool for modelling certain processes and to automate calculations especially when thoose calculations were iterative!! [god bless ...
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Solve the equation:
(a) e^2x - 2e^(-2x) = 1
Ans is y = 2 and y = -1
Is the answer correct? If not, could you please show me the correct workings for this question? Thanks.
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Differentiate with respect to x,
2x^2/ (3x -2)
My answer is (6x^2-8x)/ [3x-2]^2
Is my answer correct? If not, can give me the correct answer so that I could correct it..Thanks.
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Find the first three terms in the expansion of
(i) (1 - 2x/3)^5
I have 1 - 10x/3 + 40x^2/9 + ... as the answer. Is my answer correct? If not, could anyone give me the correct answer and I ...
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So I have this program... it creates (or I create) a set of "High points", which end up being the only predefined locations on the map. The program then goes through every other point on...
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A line XY is produced to a point Z such that (YZ - XY)^2 = XZ = XY.
Given that YZ = 9cm, find
(a) the length of XY,
(b) the ratio YZ : XZ
Please explain your workings. Thanks a l...
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Tom sold a watch to Dick at a profit of 20% and Dick sold it to Harry at a profit of 30%. If Harry paid $780 for the watch, calculate how much Tom paid for the watch.
The working solutions:
...
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Solve e^(x-1) = 9 - 18e^(1-x)
I have no idea on how to do this...Please help.
...
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(a) Find the number of arrangements of the letters in the word ANGLES if (i) there is no restriction.& (ii) the vowels must be separated.
Please show your workings and explain. Thanks a lo...
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Differentiate In[(4x+5)/(2-3x)] with respect to x.
I don't know how to do this question..I don't even know how to start off the question...Please help..Thanks.
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Write down and simplify the first four terms in the expansion of [1- (x/2)]^10.
Hence find the coefficient of x^3 in the expansion of (5+4x)(1 - x/2))^10.
My workings:
[1- (x/2)]^10 = 1 ...
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How in VB.net forums, do you √ something? What's the code? Thanks.
:F
...
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hey guys,
i'm trying to run some monte carlo simulations and need to draw a sample from a distribution which is defined by its parameters (e.g.a normal distribution with given mean and stdev)....
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Question 1:find the area enclosed by the curve y = (x^2 - 3x) and
the line y = x
Question 2: Find the area of the region in the first quadrant enclosed by the curve y = (x^2), the y axis an...
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It is given that y varies inversely as x and y=20 when x=40
a) if x increased by 50%, find the percentage change in y.
I have worked out the solution, my answer is 33.3...%, is that corr...
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Find the value of the real number k, given that
|k
|
| 1/ x^2 - 4x + 5 = pi/4
|
|0
k and zero are the limits as seen above
i am getting as far as.......[tan^(-1) k - 2] -...
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I'm trying to manipulate Evies software from some macro in Excel. Is it possible? Does a dll exist?
...
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Has anyone heard of the simplex algorithm? Essentially it is the most efficient optimisation algorithm in linear programming for any number of variables and constraints. For those who are not fa...
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Hi,
I have an item which I need to provoide a margin of 40%. Could someone confirm my way of thinking.
Mark-up
An item cost us £1.00 which represents 100% so to mark up 40% would be £1...
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Given that x = 1 1/2 is the only solution to the equation 4x^2 - ax + b = 0, find the value of a and of b.
Please show and explain your workings, thanks a lot!
...
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Find an expression in terms of n, for the nth term of the sequence 17, 14, 11, 8, 5, ...
The answer is 20 - 3n
But I do not understand why the answer is that so could anyone explain it t...
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Factorise completely:
16x - 4x + xy - 4y
= 4(4-x) + y(x-4)
= 4(x-4) + y(x-4)
=(x-4)(4+y)
Is this correct? I am not sure as the answer is (4-x)(4-y)
If I am wrong, can please show...
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