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Two equations involving fractions |
2012-06-12 |
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From Fatima:
Hi ,teacher gave two question to my daughter as follows
Solve 2/x+3=(1/xx-9)-(1/x-3)and
Solve (4/x-2)-(x/x+2)=16/xx-4
Please help me
Thanks & regards fatima
Answered by Penny Nom. |
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A cylinder is to be filled with peas. |
2012-06-12 |
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From Silje:
Hi! How can I solve the following question without the use of a calculator?
"A cylinder is to be filled with peas. It is done like this: At 12:00 o'clock you put 1 pea in, at 12:01 you put 2 peas in, at 12:02 you put 4 peas in, at 12:03 you put 8 peas in, and so on.
This continues until 14:00 o'clock (two hours later), when the last peas are put in and the cylinder is full. At what time is the cylinder half full?"
Answered by Robert Dawson. |
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Expanded exponential form? |
2012-06-12 |
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From Ramon:
express the numbers 990 614 000 005 in expanded exponential form.
Answered by Harley Weston. |
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Scheduling an academic competition |
2012-06-12 |
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From Mike:
I need to schedule 18 high school teams to play each other in a "Jeopardy!"-like academic competition. Teams compete against each other 6 at a time (simultaneously) in 3 different rooms. What will the minimum amount of matches (I believe 6 ?) we would have to play to ensure that each team plays every other team exactly twice?
And more importantly: what would that schedule look like?
The best I've come up with is having most teams playing twice, but with 2 pairs of teams having to play either only once or sometimes 3 times.
Thanks in advance for any help you can give! :-)
Mike
Answered by Chris Fisher. |
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Why is the letter Z used for the integers? |
2012-06-11 |
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From ROSE:
WHY is that the acronym of integers is represented by letter Z or J?
Answered by Chris Fisher. |
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A geometric sequence |
2012-06-10 |
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From vicki:
The sum of the first three terms of a geometric sequence of positive integers is equal to seven times the first term, and the sum of the first four terms is forty-five. What is the first term of the sequence?
Answered by Penny Nom. |
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The position of an aircraft relative to the airport |
2012-06-08 |
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From Dennis:
"Air traffic controllers usually describe the position of an aircraft relative to the airport by altitude, horizontal distance, and bearing. Suppose an aircraft is at altitude 500m, distance 15km, and bearing 35 degrees east of north. What are the x,y, and z components (in meters) of the position vector. The x-axis is east, the y-axis is north and the z-axis is vertical.
Answered by Penny Nom. |
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A multinomial theorem |
2012-06-08 |
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From Anuj:
if (1+x+xsquare) whole raise to 20 is a0 + a1x + ........ + a20xraise to 40, then find a0 + a2 + a4 + .......... + a38.
How do you solve this???????
Answered by Robert Dawson. |
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9-3(2+6)/6-2*5 |
2012-06-08 |
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From Sammi:
Hi there,
I am doing a practice test for my admittance into a college accounting program
and I am really confused by this equation.
The answer I got was way off what the test answer sheet says it should be.
The question is
9-3(2+6)/6-2*5
If you could explain how the answer beccomes 35 that would be greatly apprciated!!
Thank you!
Answered by Robert Dawson. |
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A quadratic function |
2012-06-08 |
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From Salehah:
Hi there, i dont know how to do quadratic equations. So how do i do the question,
that says: x-int -4 and 2, and y-int of 4? and we are to maek a quadratic function with this information.
Please help!
Thank you very much!
Salehah
Answered by Robert Dawson. |
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Long division |
2012-06-07 |
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From Emily:
Simplify the expression using long division (9x^2-41x-6)/(x-4)
Answered by Penny Nom. |
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The surface area of a dome |
2012-06-06 |
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From sravya:
how to calculate surface area of a dome if its base radius and height are known and neither it is hemisphere nor radius of sphere is known??
Answered by Walter Whiteley. |
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A reel of cotton thread |
2012-06-05 |
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From Grace:
91 meters of cotton goes round the cotton reel. About how many times does the cotton go round the reel?
Give your answer to the nearest ten.
(The Diameter of the cylinder is 3cm)
Answered by Penny Nom. |
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29 golfers |
2012-06-04 |
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From robert:
i have 29 golfers and have to make 8 teams for a golf scramble there will be 5 teams of 4 and 3 teams of 3 what is the fairest way to make up the teams?
Answered by Victoria West. |
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16 golfers, 4 rounds |
2012-06-04 |
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From Gerry:
16 golfers, 4 rounds - best pairings so that everyone plays with each other at least once.
Answered by Harley Weston. |
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