2,567 Answered Questions for the topic Maths

Maths

05/03/16

help please
Mr. Hayes water bill for every 30 days is $16. He then put in plants and grass and an automatic sprinkler.for the next 30 days his sprinklers were on every day for 15 minutes, 4 times a day. His... more
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Maths

05/03/16

How to find the number of steel ball bearings,each diameter 0.7 cm3,that can be made from 1 kg of steel,given that 1 cm cube of steel weighs 7.8 g
How to find the number of steel ball bearings,each diameter 0.7 cm3,that can be made from 1 kg of steel,given that 1 cm cube of steel weighs 7.8 g
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Maths

04/27/16

if the sum of two numbers is multiplied by the first number we get 520 and if the sum is multiplied by second number we get 1080 find the smaller of two numbers
please help very difficult problem for me.
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Maths

04/23/16

A shape is made up of a square and a rectangle. The perimeter is 70cm. The area of the shape is 121 squared. What is the are of the rectangle?
this should be easy I cant do it you should haha
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Maths

04/20/16

daniel leaves his house at 07:00 he drives 87 miles to work he arrives at an average speed of 36 miles pre hour at what time did daniel arrive at work?
I don't know how to answer it or what the answer will be.
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04/14/16

probability
A certain medical disease occurs in 5% of the population. A simple screening procedure is available and in 3 out of 10 cases where the patient has the disease it provides a positive result. If the... more
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04/14/16

Venn diagrams
The company is conducting a survey to determine the spread of two strains of viruses (type A and type B) in a certain wing of a hospital. Out of 450 patients, 267 tested positive to virus A253... more
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Maths

04/13/16

solving inequality
|x−3|<3x2−9x+2 solve for x
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04/12/16

whats the scientific definition of motion
i want the main definition scientist use
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Maths Math

04/11/16

Find the value of k such that the system will have no solutions.
3x-8y=-9 -2ky =4x+5
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04/07/16

Maths Vectors Question
Show that, for all vectors, u and v, |u x v|^2 = |u|2|v|2 - |u.v|2
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Maths Triangles

04/03/16

I was asked this question oraly and I didn't understood what it ment I said I don't understand
I was asked this question oraly and I didn't understood what it ment I said I don't understand what it is I was said a brilliant student would have imagined and answered the question though I still... more
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Maths Summation

04/02/16

Sequence and series
If n     i     jΣ    Σ    Σ 1= 220i=1 j=1 k=1   Then find the value of n
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Maths Summation

04/02/16

Sequence and series
The value of n(sigma)i=1 i(Sigma)j=1 j(Sigma)k=1 =220, then the value of n is    (*Sigma here is the summation sign)  The options are  11,12,10,9
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04/02/16

Sequence and series
Let a = 111....1 (55 digits), b= 1+10+10^2..+10^4, c= 1+ 10^5 +10^10 + 10^15 +..... +10^50, then which of the following is correct :   1) a=b+c 2)a=bc 3) b=ac 4) c=ab
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Maths Modulus

04/01/16

Inequality absolute value function
The question is |x|<2/x   When x>0 X^2<2   X belongs to (0,sqrt2)   When x<0  Then x^2> - 2 Which is true for all values of x So in this case x belongs to (-infinity,... more
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04/01/16

Absolute value function, modulus function
|x|+|y| = |x+y| then xy>0 |x|-|y|  =|x-y| then xy < 0   Can you please explain the above absolute value function properties and give some examples on the same 
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04/01/16

Sequence and series
If tn= (n+2)(n+3)/4 for n=1,2,3..... Then find the sum of 1/t1 + 1/t2 + 1/t3.... 1/t2003
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Maths

03/31/16

Maths Question
Solve for x:   4 - 1/2 (x + 5) =16
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Maths

03/31/16

Maths Question
7s + 4 (3 - s) = 18   What is s
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Maths

03/30/16

maths probability help
A large school in the UK offers its pupils the opportunity to learn several non-English languages. It turns out that: • 55% of pupils in this school choose to learn French; • of the pupils who... more
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Maths

03/29/16

Find the sum of the multiples of 3 or 7 under 875 For example
Find the sum of the multiples of 3 or 7 under 875For example, if we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
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Maths

03/26/16

Maths Question
What is the diameter, to the nearest tenth of a meter, of a circle whose area is 15.9 square meters?   1.    5 meters   2.    2.3 meters   3.    4.5 meters   4.     9 meters
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Maths

03/26/16

Maths Question
On a scale drawing, the scale is 1/18.  A basketball backboard system is 6 inches tall on the drawing. What is the height of the actual basketball system.     1.  36 inches or 3 ft   2.  240... more
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Maths

03/26/16

Maths Question
which expression best represent Pi     1.  c - d   2.  c + d   3.  c x d   4.  c divided d
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