2,563 Answered Questions for the topic Maths

Maths

11/13/17

When you flip a biased coin the probability of getting a tail is 0.47. Find the probability of getting a head.
I'd really like some help with this question so if anyone knows the answer or the working out please let me know :)
Follows • 1
Expert Answers •1

11/13/17

CALCULATE THE CONCENTRATION OF A SAMPLE OF BOVINE SERUM ALBUMIN
Calculate the concentration of a sample of bovine serum albumin (Mr 67,000) with an absorbance at 280 nm of 0.5, giving your answer in units of M (Molarity) (NOTE: ε at 280 nm = 1 cm3 mg-1 cm-1 and... more
Follows • 2
Expert Answers •1

11/13/17

CALCULATE PROTEIN CONCENTRATION
Calculate the protein concentration for a sample with an absorbance at 280 nm of 0.5, giving your answer in units of mg protein/ml (NOTE: ε at 280 nm = 1 cm3 mg-1 cm-1 and a cuvette of 1cm path... more
Follows • 2
Expert Answers •1
Maths

11/09/17

A shop sold 256 less phones on Sunday than they did on Saturday. If they sold 160 phones on Sunday how many did they sell on Saturday?
Its a third class maths problem and my brother wants me to put it on this website because he got it wrong 
Follows • 2
Expert Answers •1

11/08/17

What is the sum of integers between two numbers if those numbers are the same?
sum of all even integers between x and y inclusive   if x is 2 and y is 10, even sum is 30what if x is 2 and y is 2 and x is 2 and y is 3
Follows • 2
Expert Answers •1
Maths

11/07/17

A=1+3+5+7+.......2009. & B=2+4+6+......+2010 then the value of (A-B) is
Please solve this question
Follows • 2
Expert Answers •1
Maths Equation

11/06/17

A rectangular block of land 4m X 25m is surrounded by a concrete path 1m wide, what is the area
It’s a problem solving question and it’ll be great if I receive an answer as soon as possible 
Follows • 2
Expert Answers •1
Maths

11/06/17

if it takes 4 hours for 10 workers to mend a road, how long would it take for 8 workers?
 a maths question that i need help with
Follows • 2
Expert Answers •1
Maths Algebra

11/05/17

Find the equation of the tangent at the origin for : siny = 2sinx
Find the equation of the tangent at the origin
Follows • 3
Expert Answers •2
Maths Algebra

11/05/17

Prove that there are no stationary points for x^3 + xy^2 - y^3 = 5?
Prove that there are no stationary points for x^3 + xy^2 - y^3 = 5?
Follows • 2
Expert Answers •1

11/03/17

value of x when m=2 and k=4
i need to solve this maths equation if also u can solve this equation value of m when x=19 and k=5
Follows • 1
Expert Answers •1

11/01/17

how do you solve trigonometry multi-step questions with triangles trying to find 'x'
 how do I find the value of the length 'X' where there are two right angle triangles making up a large triangle and 'x' is one of those sides?
Follows • 2
Expert Answers •1
Maths Algebra

10/31/17

how would i get the answer for for a cuboid with the length L=x+2and a width of x-3, also a height of x+4. All measurments are in cm.
question is: how would i write this as an expression in terms of X, for the total surface area thanks
Follows • 1
Expert Answers •1
Maths

10/31/17

There are some $2 and 50￠coins in a purse. If the total number of coins is 17 and their total value is $22, find the total value of $2 coins
It's about equations. And have to find the total value of the $2 coins. By the format of equations and terms.
Follows • 2
Expert Answers •1
Maths

10/30/17

It is given that 25a x 125b = 5 and also that 625a/5b = 25. Which is true: a and b are positive a and b are negative neither of the above are true.'
i got this for homework and idk what to do with it so answer it
Follows • 2
Expert Answers •1
Maths

10/28/17

An aeroplane flies at 750km/h. If he flies 977km, how long will the flight be? To the nearest 30 min.
I just need to know if it is correct to devide the 977km by 750. The answer is 1.3, but rounded of to nearest 30 minutes?
Follows • 2
Expert Answers •1
Maths

10/27/17

A floor is covered by 800 tiles measuring 10 cm^2. How many square tiles of side 8 cm would be needed to cover the same floor?
A floor is covered by 800 tiles measuring 10 cm^2. How many square tiles of side 8 cm would be needed to cover the same floor?
Follows • 1
Expert Answers •1
Maths

10/26/17

one positive number is 3 bigger than another number. when the larger number is added to the square of the smaller one, the result is 33
what would the equation be
Follows • 2
Expert Answers •1
Maths

10/26/17

Callum used 9/10 of a metre of wood to make a model boat. He used 7/8 of this amount to make a model areoplane. How much wood did he use to make the aeroplane?
Please help
Follows • 2
Expert Answers •1
Maths

10/25/17

What is the sum of all negative factors of 105?
Plzllzlzz
Follows • 3
Expert Answers •2
Maths

10/25/17

m and n are two prime numbers such that m+n=21 find possible values of 2n+1/m
Plz it's math
Follows • 2
Expert Answers •1

10/25/17

A motor racing circuit has length 5 5/6 miles. A straight section of the circuit has length 1 1/4 miles. What fraction of the circuit is the straight section?
 Dividing fractions
Follows • 2
Expert Answers •1

10/24/17

What is LCM of 20 and 24
I want (LCM) of 20 and 24 the Lowest common Multiple so plz tell me the (LCM) of 20 and 24
Follows • 2
Expert Answers •1
Maths

10/24/17

16 blue pens cost £2.40 and 18 red pens cost £2.70. Compare the cost of the pens and find out which is better value
I'm not sure how to do this and even if I could I dont understand the question?
Follows • 1
Expert Answers •1

10/23/17

BIDMAS (BODMAS) query
Hello   I need help with a maths question.  Two primary schools have given different answers using different methods for the following KS2 maths question so I'm looking for a consensus on the... more
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.