2,563 Answered Questions for the topic Maths

02/19/18

Polluted water was found to have the following pollutants in a ratio of 3:5:10. The chemicals are sulphuric acid, hydrochloric acid and ascetic acid. Calculate
to continue this question: calculate the volumes of each of the three chemicals in a 5ml sample.
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02/19/18

It is estimated that light takes 100 000 years to travel the full distance across our galaxy, the Milky Way. If light travels 3.0 x 10 8 m in 1 second, how long
to continue the question      If light travels 3.0 x 10 8 m in 1 second, how long is the Milky Way? Give your answer in standard form.
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02/19/18

A block cut from asteroid rock was measured to have dimensions: 13.3mm x 12.4mm x 15.2mm. Find the volume of the block. Give your answer in standard form.
I need help with this question
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02/19/18

Enthalpy diagram help
Given that: Sn(s) + Cl2 (g) → SnCl2 (s); ΔH = - 350 kJ mol-1 and Sn (s) + 2Cl2 (g) → SnCl4 (s); ΔH = - 542 kJ mol-1draw a thermal cycle and calculate the enthalpy change for SnCl2 (s) + Cl2 (g) →... more
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02/19/18

2 to the power of ????=0.0156 or 1/64
answer please
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Maths

02/18/18

A glass is 1 3 full. Then 75cm3 of orange juice is poured in. The glass is now 3 4 full. What is the total volume of the glass?
need the answer asap ples !
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02/17/18

Fruits - Math Equation
Glenys, Karen, Nicola, Philippa and Shirley enjoy healthy snacks on their daily tea break. There are 5 different pieces of fruit left in the Common Room fruit bowl: an apple, a banana, a nectarine,... more
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Maths

02/15/18

Royston went to Stall A and B to buy rice. Stall B had 3 times as much rice as Stall A. There was a total of 6 packets of rice in Stall B. Each packet contained
I don't know the answer!
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Maths

02/14/18

Find the surface area of a cube of volume 1000cm³
....mjdkyffdjdj.rh Y,yvljhswbgoedgj.  
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Maths Factoring

02/13/18

Mixed factors factorise: 3m - 15- 5n + mn=?
So i have to factorise: 3m - 15- 5n + mn= the answer is supposed to be (m - 5) (3 + n) but idk how to approach the question
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Maths

02/10/18

The present ages of A and B are in ratio 7:5 . Ten years later ages will be in ratio 9:7 . Find their present ages?
Want to ask maths questions 
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Maths

02/10/18

Kim;s father is 7 times her age. In 20 years time he will be twice her age. How old are they now?
I need help and working out with alegbra
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Maths

02/08/18

What are the max number of chairs occupied
In a class there are 30 chairs in a row. all of them initially unoccupied. From time to time, a student enters in the class and sits on one of the free chairs. If either of the neighbours is... more
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Maths

02/08/18

What is the range of possible times for the winner?
A stop-watch records the time for the winner of a 100 metre race as 14.3 seconds , measured to the nearest one tenth of a second
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Maths

02/06/18

Integrate Lim -a to +a underroot a-x / a +x
Integration 
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Maths

02/06/18

A glass is 1/4 full. Then 24cm3 of orange juice is poured in. The glass is now 2 5 full. What is the total volume of the glass?
HELPPPPPPPPPPPPP :A glass is 1/4 full. Then 24cm3 of orange juice is poured in. The glass is now 2/5 full. What is the total volume of the glass?
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Maths Index

02/05/18

How do i convert to index form?
No idea what i'm doing. But how do i change 5 / 9 (a + 3b) ^7 to index form. Could i also have your formula and your thought process to your answe
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02/04/18

Profit and loss question
An electronic machine can show correct weight within the range +10….-10 grams.. Nathan used this machine and sells items at the cost price. If he sells only in the form of 400grams packets then... more
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Maths Functions

02/04/18

Help with function question
For all values of x, f(x) = 3x+k, where k is a constant. Given that ff(3) = 7, find the value of k. Cheers for any help :)
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Maths

02/04/18

If a triangle has its sides in the ratio 2:3:5 and value of s is 35 cm then what is the perimeter of the triangle
Plz give me the ans
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Maths

02/02/18

A number is multiplied by five, and two-fifths is subtracted from the result. The result is three-quarters. The number is:
A 7/100 b 3/21 C 23/100 D 21/12 E 11/12
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Maths

02/01/18

laura collects foreign coins. she has 86 in total. she has 50 lira and drachma. she has 59 lira and peseta. how many lira coins does she have?
a simple maths question.
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02/01/18

Help with maths problem while learning to calculate stocks.
Which is a better Investment: A stock of 6% for $108 or a stock of 4% at $90. This is all that is given I tried some thing but couldn't figure it out. Please Help.
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Maths

01/29/18

what is the fraction
numerator is one less than the denominator.if 3 is added to both numerator and denominator the fraction becomes 3/28 times the original. what is the fraction?
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Maths Science

01/28/18

share 40 pounds between tim and sam
maths question  
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