2,578 Answered Questions for the topic Maths

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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Maths

11/16/15

What is the answer ?
The Chuckle Brothers have 20 pounds worth of change in a bag. When they split it, Paul should get 1 pound less than Barry. Knowing this, how much money does Barry need to take in order for him to... more
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11/15/15

Hi. Please help me solve this question.
1) A flying doctor plane flies from its base (B), in a direction of 072degreesT for 80km to reach an outback station (S). From there, the flying doctor travels in a direction 162degreesT for... more
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11/15/15

Hi. Please help me with the following two mathematical questions.
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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11/15/15

Hi. Please help me with the following mathematical equations.
1) A flying doctor plane flies from its base (B), in a direction of 072degreesT for 80km to reach an outback station (S). From there, the flying doctor travels in a direction 162degreesT for... more
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Maths

11/14/15

a^3 + b^3 + c^3 = 33 What is a, b and c value?
a^3 + b^3 + c^3 = 33What is a, b and c value?
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11/14/15

Hi. Please help me with the following mathematical question.
1) A flying doctor plane flies from its base (B), in a direction of 072degreesT for 80km to reach an outback station (S). From there, the flying doctor travels in a direction 162degreesT for... more
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11/12/15

Hi. Please help me with the following mathematical questions.
1) A flying doctor plane flies from its base (B), in a direction of 072degreesT for 80km to reach an outback station (S). From there, the flying doctor travels in a direction 162degreesT for... more
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11/09/15

a red flare followed the function f(x)= -(x-15)^2+175. a green flare followed the function f(x)= -x(x-25). which flair went highest in the air?
((where x is the horizontal distance in meters and f(x) was the height in meters.)) I got the question partially correct, the red flare went the highest but I got the highest height of the two... more
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11/05/15

Please help me with the following mathematical questions.
1) I did time=distance/speed. my sum was 170/35=time. My answer was 4.85714. How do i show that in hours and the nearest minute?   2) Again, i used the same formula for another question and... more
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Maths Equation

11/05/15

Equations (maths)
"Solve the equation 3x^2+4x-12=0 Give your solution to 2 decimal places"   I would like to know how to workout this, as I only have the answer.   thank you.
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11/05/15

Word problem, lower/upper bounds (maths)
Steve travelled from Ashton to Barnfield   He travelled 235 miles, correct to the nearest 5 miles.  The journey took him 200 minutes, correct to the nearest 5 minutes.   calculate the lower... more
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11/05/15

Word problems (maths)
"Claire is making a loaf of bread. A loaf of bread loses 12% of its weight when it's baked. Claire wants the baked loaf to weigh 1.1kg. Work out the weight of tbe loaf of bread before it is... more
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Maths Integer

11/05/15

integer values
"Show that (n+3)^2-(n-3)^2 is an even number for all positive integer values of n"   I would like to know how to workout this type of question.   Thank you in advance.
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Maths Density

11/05/15

Density question (maths)
"Liquid A has a density of 0.7g/cm^3. Liquid B has a density of 1.6g/cm^3.   140 g of liquid A and 128g of liquid B are mixed to make liquid C.   What is the density of liquid C?"   I would... more
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Maths Bearings

11/05/15

Bearings (maths question)
"Martin and Janet are in an orienteering race.   Martin runs from checkpoint A to checkpoint B, on a bearing of 065° Janet is going to run from checkpoint B to checkpoint A.   Work out the... more
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Maths Coordinates

11/05/15

Coordinates question (maths)
"The points A, B and C lie in order on a straight line.   The coordinates of A are (2, 5) The coordinates of B are (4, p) The coordinates of C are (q, 17)   Given that AC= 4AB, find the... more
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11/04/15

Please help me with the following mathematical question.
Rescue Option 2: Rescue BoatThere is a rescue boat that is already out at sea at R. However, it receives distress calls from the yacht and another boat, at the same time.The rescue boat must go to... more
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11/04/15

Please help me with the following mathematical question
There is a rescue boat that is already out at sea at R. However, it receives distress calls from the yacht and another boat, at the same time.-The rescue boat must go to the nearest distress call... more
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11/04/15

Please help me get x alone.
8100=x^2 + 25600-2x2cos(90)   Thanks so much
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11/01/15

multiple choice exam where probability of correct answer is different from if you know it or gamble
A student takes a multiple-choice exam. Suppose for each question he either knows the answer or gambles and chooses an option at random. Further suppose that if he knows the answer, the probability... more
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Maths

10/30/15

the present value of £100 when discounted at 14% is £87,7 and £90.9 at 10%. what is the difference, is it 3.4 3.5%, how do you get the answer
maths question
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Maths

10/29/15

kerry earns £15 per week for a part time job how must she work to save up £300
Im not sure what the sum is need an answer
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