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A problem in base x |
2016-03-25 |
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From Malith:
determine the value of base x of (211)x = (152)8
please mentioned the steps
Thank you
Answered by Penny Nom. |
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Travelling in a spacecraft |
2016-03-25 |
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From julie:
if i was travelling in a spacecraft at the speed of light and i turned on my headlight would i see the beam ?
Answered by Robert Dawson. |
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A rotating schedule for a softball team |
2016-03-25 |
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From Caroline:
I couldn't find a similar question, hopefully there isn't one!
I have a softball team of 18 people (7 girls and 11 boys), but am limiting each game to 13 players (6 girls and 7 boys). The season is 10 games long. How do I create a rotating schedule which allows members to play evenly? I tried separating the boys and girls to create rotation for each but I got confused. Some are unable to attend all games but for the simplicity of a rotation schedule can you please help?
Answered by Robert Dawson and Victoria West. |
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The inverse of a function |
2016-03-20 |
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From Billy:
f(x) = Square root(x^2 + 2x)
What is the inverse?
Answered by Penny Nom. |
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Biking and jogging |
2016-03-17 |
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From alondra:
Ricky went on a bike ride. After 6 miles he got a flat tire and had to jog home. He jogs 3mph slower than he bikes, so the jog took 1 hour longer than the bike ride. At what rate did he travel each way?
Answered by Penny Nom. |
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The perimeter of a rectangle |
2016-03-17 |
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From Linda:
Noel correctly adds the length of three sides of a rectangle and gets 88 cm her brother Ryan correctly adds the lengths of three sides of the same rectangle and gets 80cm. What is the number of cm in the perimeter of the rectangle
Answered by Penny Nom. |
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A block wall |
2016-03-15 |
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From Robert:
I have a wall 40 ft. long and 4 ft. tall as well as another one that is 30 ft by 3.5 ft. tall that I am trying to build. how many 6 inch by 12 inch landscaping blocks do I need?
Answered by Penny Nom. |
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The sides of a triangle |
2016-03-15 |
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From Hitarth:
Why we cannot construct a triangle ofngiven sides 5cm,5cm and 10cm?
Answered by Penny Nom. |
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tan inverse 1/4 |
2016-03-14 |
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From nazz:
prove; tan inverse 1/4=1/3 cot inverse 52/47
Answered by Chris Fisher. |
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Angles |
2016-03-12 |
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From Laurynn:
What are angles in general (please include the 'angle of incline')
Thank you
Laurynn
Answered by Penny Nom. |
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The integral of a sum |
2016-03-10 |
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From Rahul:
How to solve definite integral of a sum. The specific problem is as follows,
Integral of ( 1+ sum of x^k, k=1 to k=n), x=0 to x=b *dx.
The answer is b + sum of b^(k)/k, k=2, to k=n+1. I understand only the integral
of first term. But integral of the sum I do not understand at all.
Answered by Penny Nom. |
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A circle and a chord |
2016-03-10 |
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From Mujtaba:
The distance of a chord of length 16 cm, from the centre of the circle of diameter 20 cm
Answered by Penny Nom. |
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A word problem |
2016-03-10 |
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From Sam:
Jo is 10 cm taller than Ruth. Pam is 16cm taller than Ruth .Rod is 8cm taller than Pam.
How much taller than Jo is Rod?
Answered by Penny Nom. |
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An equation with fractions |
2016-03-09 |
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From Ed:
7/10-___ +3/2=6/5
Answered by Penny Nom. |
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Can you construct a regular 21-gon? |
2016-03-08 |
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From Peter:
hi, i know that if i use a compass to draw a circle, i can use the same setting to mark 6 intervals along the circle circumference, how would i go about marking out 21 equally spaced points around the circumference?
if there an online calculator i can us, or some other interesting trick?
tia
peter
Answered by Robert Dawson. |
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