2,575 Answered Questions for the topic Maths

11/03/14

Really need urgent help with tensors!!
So say a tensor and vector have components Tαβγ, and vα, respectively in a coordinate system xμ. There is also another coordinate system x'μ   I want to show that Tαβγvβ = Tαβγvβ   Please if... more
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Maths

11/02/14

If a sheet of steel 4' by 8' weighs 96 lbs. What is the weight per square foot?
If a sheet of steel 4' by 8' weighs 96 lbs. What is the weight per square foot? 
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Maths

11/01/14

profit and loss
A shopkeeper listed his price of goods 30% above CP. He sells half the stock at this price, one fourth of stock at discount of 15% and the remaining at 30% discount. His overall profit was?
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Maths

11/01/14

time and work
A takes 3 times long as B+C together and B takes 4 times as long as A+C together. All 3 working together takes 24 days to complete, then time taken by A alone to complete???    
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Maths

10/29/14

parabola help!!
When waiting to land, an airplane is traveling above the airport in a holding pattern that can be modeled by the equation 49x^2 + 64y^2 = 3136, with the air traffic control tower at the origin.... more
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Maths

10/28/14

compound interest
A man gave 50% of his savings of 84,100 to his wife and divided the remaining the sum among his 2 sons A and B of 15 yrs and 13yrs resp.He divided in such a way that each of his son, when they... more
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Maths

10/28/14

number system
x^2+y^2+1=2x, find value of x^3+y^5?
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Maths

10/27/14

number system
The multiplication of 3 digit number XY5 with digit Z yields X215. what is X+Y+Z???
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Maths Math

10/23/14

A cuboid has a square base of side x cm. The height of the cuboid is (x + 4) cm. The volume of the cuboid is 150cm^3. Show that x^3 + 4x^2 = 150
A cuboid has a square base of side x cm. The height of the cuboid is (x + 4) cm. The volume of the cuboid is 150cm^3. Show that x^3 + 4x^2 = 150
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Maths

09/27/14

binomial theorem
the number of distinct terms in the expansion of (1+px)20 +(1-px)20 is...?
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Maths

09/27/14

Binomial theorem
IF α=(5/2!*3)+ 5*7/3!*32+5*7*9/4!*33.....THE FIND VALUE OF α2+4α
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Maths

09/27/14

binomial theorem
The coefficient of xn in the expansion of (1+x+x2+......)-n  is?
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Maths

09/27/14

binomial theorem
The cube root 217 is?   how to do it with binomial expansion?
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Maths

09/27/14

binomial theorem
Find the first negative term in the expansion of (1+x)27/5 where x is a positive number.
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09/26/14

complex number
IF 1,ω+ω²+.....+ωn-1 are the nth root of unity, then the value of (1/x-1)+(1/x-ω) +......+1/x-ωn-1 =________?  
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Maths

09/25/14

maths help
Find the area of the region described by y≥ 2|x-3|+4 and x-2y ≥ -20.
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Maths

09/24/14

maths help(probability)
A well-traveled highway has its traffic lights green for 82% of the time. If a person traveling the road goes through 8 traffic intersections, finda) the probability that the firstred light occur... more
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Maths

09/23/14

maths help
the vertices of a square are z1,z2,z3,z4 taken in anticlockwise order then z3 equals 1. iz1+(1+i)z2 2.iz1+(1-i)z2 3.z1+(1+i)z2 4.(i+1)z1+z2  
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Maths

09/23/14

complex number
Let z1,z2,z3 be 3 vertices of equilateral triangle circumscribing the circle mod z =1/2. If z1=1/2+(√3i/2) and z1,z2,z3 are in anti clockwise sense then z2 is?
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09/23/14

complex number
If mod z =2, then the points representing the complex numbers -1+5z will lie on a?? 1. circle 2. straight line 3. parabola 4. ellipse
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09/23/14

complex number
If one vertex of an equilateral triangle is 1+i and centroid is it's origin then other two vertices of triangle are?
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09/15/14

Profit and Loss Based Question
Raju calculated his profit percentage on the selling price and claimed it to be 100/3.Find the actual profit percentage
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09/15/14

Profit and Loss Based Question
AMar bought an article and sold it at 37.5% profit.If he had bought it at 40 rupees more and sold it at 40 rupees less , he would have made 125/3 % loss.Find his cost price?
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09/15/14

Finding solutions to equations with the constant k? Linear algebra
Consider the system of linear equations x+ 2y =2 -x + (k-3)y +3z = −2 2x + (k+3)y + (k+3)z = 5 where k ∈ R is a constant. Determine the values of k for which the system has a unique solution,... more
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Maths

09/13/14

binomial theorem
n-1 ∑           ncr/(ncr+ncr+1) equals? r=0
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