2,570 Answered Questions for the topic Maths

03/30/15

A farmer has x pigs and y chickens. Write an expression for how many head? Write an expression for how many legs?
Can someone please explain the method for getting the answer to the second one and what the answer is? Thanks
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Maths

03/25/15

Solving linear equations
one hundred and ninety students go on a tour. They go on minibuses that carry 14passengers each and In buses that carry 40 passengers each. There were eight vehicles used in full. How many of each... more
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Maths

03/25/15

Solving problems using linear equations
A pet shop have rabbits and gerbils for sale. They have 20 animals altogether. They sell two rabbits. Then one of the gerbils has twins. The shopn now has three times as many gerbils as rabbits.... more
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03/25/15

Singular points help
For the differential equation:2(1-x)y''-3y'+(y/x)=0What are the singular points and determine whether they are regular or irregular? Then find the roots of the indicial equationThank you to whoever... more
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Maths

03/23/15

Calculate the lineal metres of timber (150mm x 45mm) required to form up the edge of a concrete slab 6.0m x 2.5m x 150mm (no allowance for waste)
I need Help Please 
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Maths

03/19/15

The ratio of a triangle is 1:2:3 what is the size of the largest angle?
United kingdom 
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03/17/15

Complicated integral
The question has to do with the Schrodinger equation in one dimension and using the propagator. I have gotten an integral but it has to be solved to get the final solution which I can't get. The... more
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Maths Math Help

03/13/15

Help in rearranging terms
Given that Q=W/(1-(T0/T)) and Q=a(T-T0)rearrange so that T is the subject. The final answer is: T=T0 + (W/2a) + (1 + sqrt(1+(4aT0/W)) But I just don't know how to get to it...
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03/10/15

Quadratic models: Parabola graph of ax^2+bx+c
A parabola graph has the Vertex and Y-intercept is A(0,8) and x-intercepts of B(3,0) and C(-3,0)....   Question 1) The parabola has the equation ax^2+bx+c , Use "A(0.8)" to find the value of "b"... more
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Maths Roots

03/08/15

Could anyone help me with a maths problem?
If f(x) = (3x + a), determine the values of a fro which, f(x2 + x + 2) - f(3x - a) = 0 will have really roots.
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03/08/15

Green's function and differential equation
By using the Green's function, solve: y''-αy =e^(-αx) with initial conditions y(0)=y'(0) = 0thank you to whoever can do this in detail for me :)
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03/05/15

need help on this question, dont understand it.
A 15 litre cylinder contains 0.35kg of butane gas (C4 H10). Assuming ideal gas behaviour, calculate the pressure of the gas if the cylinder is stored at 50 Fahrenheit.
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Maths

02/28/15

Sorry. Maths question.
I have fifteen books in total. If five of them are written by me, and I pick four random books to take on holiday, what is the probability that exactly 2 of my books are written by me?
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02/26/15

Harmonic oscillation x=sin?nt?
Hey guys,Hope someone can give me a hand on this one?A particle is subjected to undamped harmonic oscillation described by the equation:x=sinωntProve that the linear acceleration of the particle is... more
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02/24/15

what is the formula for finding n in compound interest
A=P(1+(r/100))^n
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Maths

02/18/15

Which vinegar listed containing a certain percentage of acetic acid is the best value for money?
4.73% of acetic acid in the vinegar for £0.83 6.19% £1.15 5.04% £1.15 5.21% £3.00 5.13% £0.50 6.1% £1.50
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Maths

02/18/15

If 1140ml of vinegar contains 4.75% of acetic acid how do I work out the percent of acetic acid in 1ml?
If 1140ml of vinegar contains 4.75% of acetic acid how do I work out the percent of acetic acid in 1ml?
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02/15/15

Limits of sequences, please help!
limn->infinite[ (-1)n/(n3-12)}  I dont know what to do with (-1)n, if it's equal to infinite then if I divide by n3, it's infinite over infinite. I dont understand :S. And the question is if... more
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02/10/15

prove that: 1-cos2?/sin2?=tan?
Prove that:   1-cos2θ/sin2θ=tanθ   Please show workings.   Thank you.
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02/10/15

show that: [tan(x+p/4).tan(x-p/4)]=1
Show that:[tan(x+π/4).tan(x-π/4)]=1   please show workings.   I ended up at. 1.tan(x)+1/1+tan(x)=1not sure i'm right though.
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Maths Math Math Help

02/03/15

Prove that.....
Anyone help me solve this?Prove that: cos(y-Π)+sin(y+Π/2)=0    
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Maths

02/02/15

maths problem
Rearrange this formula to make b the subject. b) Factorise x2+ x — 2 hence simplify x^2+x-2 over x^2-4
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Maths

02/02/15

simultaneous equation
2x+3y=15.5   x+y=6
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Maths

02/02/15

maths problem
12 ) y is directly proportional to x3 When x = 2, y = 20. (a) Find y when x = 8. ¦ (b) Find x when y = 1000.
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Maths

02/02/15

maths problem
 On another special offer day, all prices are reduced by 40%. At the end of the day. special offer prices go back to normal. By what percentage do special offer prices increase at the end of the day?
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