2,575 Answered Questions for the topic Maths

01/03/16

Maths Trig identities
Exact value of Sin pi/12   I got this answer to be  (√6 - √2 )/4 (part a)   I then done the half angled identity to be  √(2 - √3)/2 (part b)   Both these expressions are equivalent and I need... more
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Maths Trigonometry

01/03/16

maths trig solutions
Find all the solutions between −2π and 2π of the equationcos θ = −1/√2
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12/28/15

What happens when a cone is immersed in a cylinder?
A cylindrical container of base radius 8 cm is filled with water to a depth of 10 cm. (The height of the container is more than 10 cm). A solid right circular cone of base radius 6 cm and height h... more
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Maths

12/28/15

Please help!
A right circular cone is embedded inside a sphere such that the rim of the base and the vertex of the cone are on the surface of the sphere. Given that the cone has a height of 8 cm and a base... more
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12/28/15

Maths, inverse proportions
Hello, could I receive an explanation  of how to solve questions that involve inverse proportions and ask for formulas.   The question is:   'y is inversely proportional to the square of... more
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Maths

12/28/15

Maths, surds
Hello, I would like to receive help with surds question:   '5√5 can be written in the form 5^k   Find the value of k.'   Thank you in advance.
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Maths

12/28/15

Maths (finding value)
Could I receive help with questions like below, because I have encountered with many of these and I don't know how to solve them.   'Solve n^2-n-90=0 to find the value of n'   Thank you in... more
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Maths

12/28/15

A builder has been asked to lay an octagonal patio using square paving slabs.he cuts some bricks in half diagonally. Each paving slab is 1m wide. What is the pe
Maths question
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12/27/15

Maths, word problems
I would like to receive an explanation how to solve word questions like the one below, because they confuse me and I get lost when I'm trying to find something.   'Gary's motorbike uses... more
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12/27/15

Maths word problems
Rectangular floor measurements:  Length= 9m Width= 4.5   'Toji is going to cover the floor with floor boards. Each floor board is 0.1 wide, and 1.5m long.   Work out the smallest number of... more
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12/27/15

Maths, probability
'Milly has a biased coin. When she throws the coin once, the probability of getting heads is 0.2. The probability of getting tails is 0.8.   Milly throws the coin 200 times.   Work out the... more
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12/27/15

Maths, working out the unknown
Hello, I would like to know how to solve such problems:   'Fred is making two rectangular flower beds. The dimensions of the larger rectangle will be three times the dimensions of the smaller... more
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Maths

12/15/15

If I have a box L = 40cm , B = 25cm , H=30cm and cylinders with the height 10cm & length 5cm , how many cylinders will fit in the box and how is this done?
How is this done? expand please?    If I have a box L = 40cm , B = 25cm , H=30cm and cylinders with the height 10cm & length 5cm , how many cylinders will fit in the box and how is this... more
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Maths

12/14/15

Scale drawings and map
A map of a park is drawn using a scale of 1:500. on the map the area of the pond is 1cm2 . find in cm2 the actual area of the pond.  
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Maths

12/12/15

Solve by using the addition method
0.4x - 0.6y = 0.50.2x – 0.3y = 0.7
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Maths

12/12/15

percentage
express 2500 cm2 as a percentage of 4 cm2.
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Maths

12/12/15

percentage
 A light year is 9.46x10^15 metres.the average distance of the planet pluto from the sun is 5.90 x 10^9 kilometres. calculate this distance as a percentage of a light year.
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12/02/15

Physics/Maths
A seat of mass 3 kg is suspended by a rope that is attached to a treebranch. The seat is pushed sideways, so that the rope remains taut, andmakes an angle of 55? with the downward vertical. The... more
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Maths

11/29/15

A Sphere and a cylinder are of same height Radius of sphere is 7cm Find the volume of cylinder of if radius of base of cylinder and radius of sphere are equal
i want answer of this question plz
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Maths

11/23/15

logs . write a simpler number or expression
2log4x = 
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Maths

11/22/15

5/8 of 75m in mixed numbers
5/8 of 75m in mixed numbers
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11/20/15

Hi. Please help me with the following question.
1) Solve the following equations using inverse operations.i) 3x-7=7+xii) 3[(6x-2)/4 (Separate)+ 1 ] = 332) A cylindrical (cylinder) water tank of diameter 2.2m and height of 3m is full of water.... more
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11/20/15

Please help me answer the following question on rational and irrational numbers.
Which of these following numbers are rational and which are irrational?   a) 5.33..... b) Pi c) 6 and 1/3 d) 0.56 e) 2.32 f) square root of 16 g) 1.038120697 h) square root 3 i)... more
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11/19/15

Please help me with the following questions on surds.
1) Expand 5 and square root 5 (square root 6 + 8 and square root 5)   2) Expand (Square root 3 - 4 and square root 5)(Square root 7 - 8 and square root 2)   USING ONLY DOPS FOR 3 AND 4   3)... more
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11/19/15

Please help me answer the following questions on surds.
1) Can a negative be a perfect square? 2) Is -67 an integer? 3) Is 3/7 an integer? 4) What is the square root of 729 with a little 3 on the left of the square root sign? 5) What is the square... more
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