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The equation of a circle |
2014-08-14 |
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From jennifer:
hi there My name is Jennifer and residing in Denmark. I am a student and I wrote to you because i am having trouble in finding out the equation for the circle using
(x-a)^2 + (y-b)^2 =3D r^2.The diameter of this circle is d=3D 44,514 cm.
I have attached a drawing of my problem..thanks
Answered by Penny Nom. |
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What percentage of 317 million is 1.2 million? |
2014-08-13 |
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From Danielle:
I would like to know what percentage of 317 million is 1.2 million.
Answered by Tyler Wood. |
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Distance, speed and time |
2014-08-13 |
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From abdel:
Mac walked to a park from the college at 5 km/h. 10 minutes later, Steve started
riding his bike at 15 km/h to the same park to meet Mac. They arrive at the same
time at the park. How far is the park from the college?
Answered by Tyler Wood. |
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1/3 of $320 |
2014-08-13 |
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From Student:
Grade:5
Please help I got tutor for selective and this question is really
bugging me a lot what is 1/3 of $320?
plez answer quick before I fail :(
Answered by Tyler Wood. |
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Speed, distance, time |
2014-08-13 |
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From Aarti:
a theif running at 8 km/hr is chased by a policeman whose speed is 10km/hr.if the thief is 100 m ahead the policeman then what will b time required for the policeman to catch the thief?
Answered by Tyler Wood. |
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How do you convert square mm to square cm? |
2014-08-13 |
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From David:
How do you convert square mm to square cm?
Answered by Tyler Wood. |
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Ratios ond percents |
2014-08-13 |
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From aswathi:
if the ratio of cost price and selling price of an article is be as 10:11,the percentage of profit is
Answered by Tyler Wood. |
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Golf for 10 |
2014-08-12 |
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From Fred:
We have 10 golfers playing 4 rounds: one 4-some and two 3-somes each round.
Can you suggest the best distribution of players?
Answered by Victoria West. |
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Golf for 15 |
2014-08-11 |
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From Brian:
I am trying to arrange 5 rounds of golf for 15 golfers. We will play 5 in a group, 3 groups per round, 5 rounds. I would like everyone to play with everyone else. Secondary objective would be for no one to play with anyone else more than 2 times.
Thank you.
Answered by Victoria West. |
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Multiplication in base five |
2014-08-07 |
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From Alise:
Hi Maths Central!
I was wondering if you could help me with multiplying in base 5. I have read a question previously answered by you in regards to this but got fairly confused by it and was hoping you could help me with my question.
My question is: Multiply 1422 base 5 by 21 base 5 keeping these numbers and answer in base 5.
Would you also be able to explain how to get to the answer?
Thanks!
Answered by Penny Nom. |
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4821x14y is an 8-digit number divisible by 72 |
2014-08-06 |
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From RAYA:
if 4821x14y is an 8-digit number divisible by 72. How many values can x and y take?
Answered by Penny Nom. |
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A chord and an arc of a circle |
2014-08-06 |
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From Luis:
Hello I am trying to figure out how to get chord lengths of quarter points for a circle. I work with large diameter circles and I need to be able to find chord length from 0 degrees to 90 degrees, 0 degrees to 270 degrees, 270 degrees to 180 degrees and 90 degrees to 180 degrees. Can you please use 100ft. diameter as example and work out the problem. I'm sorry if I use wrong terminology, I'm really bad at math . Thank you in advance for your time and help I really appreciate it.
Answered by Harley Weston. |
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The area of a quadrilateral |
2014-08-06 |
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From Rahul:
find the area of the quadrilateral whose side measure9cm,40cm,28cm,15cm and in which the angle between the first 2 sides is a right angle
Answered by Penny Nom. |
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The area of a kite |
2014-08-04 |
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From Janis:
How do you calculate the area of a kite with the diagonals 24cm and 48cm?
Answered by Chris Fisher and Penny Nom. |
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The dimensions of a rectangle |
2014-08-03 |
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From Jamaica:
if the perimeter of a rectangle is 30m and its area is 56 m2.find its length and width?
Answered by Penny Nom. |
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