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y = zx - x - c |
2001-12-11 |
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From Andrew:
Could you please help me work out the value of x where: y = zx - x - c
Answered by Penny Nom. |
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Normal lines |
2001-12-11 |
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From Kristie:
Why are perpendicular lines called normal lines?
Answered by Chris Fisher. |
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Cinderella clothes |
2001-12-11 |
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From A student:
If cinderella clothes, inc. has determined that 0.5% of all incoming phone calls involve complaints, what is the probability that in 200 incoming calls there are more than one complaint?
Answered by Andrei Volodin. |
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y= (3x+2)/(4x-5) |
2001-12-05 |
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From Courtney:
y= (3x+2)/(4x-5)
solve for x
Answered by Penny Nom. |
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Piles of coins |
2001-12-05 |
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From A student:
Sharon has less than 20 coins. When she puts them in piles of 5, she has 1 left over. When she put them in piles of 3, she also has 1 left over. How many coins does Sharon have?
Answered by Penny Nom. |
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QED |
2001-12-05 |
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From Derek:
What does Q.E.D. mean?
Answered by Harley Weston. |
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Fractions in lowest terms |
2001-12-05 |
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From Thomas:
how to change decimal to a fraction in the lowest terms .7 .65 .019 .0111 .225 .1225 .625 .25 .025 .26 .875 .5 .75 .750 .33 .09 .44 .15 .12 .90 .044 .2500 .95 .500 .02 .40 .125 .1276 .00009 .45 .125 .1276 .375 .975 .054 .0005 .20 .2 .0001 .85 .80 .9 .0007 9.8 10.17 25.75 48.4 80.35 19.64 276.20 31.042 18.1034
Answered by Penny Nom. |
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Two equations in two unknowns |
2001-12-04 |
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From Courtney:
y = 3x + 2
y = 4x - 5
solve for x
Answered by Penny Nom. |
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Permutations and combinations |
2001-12-03 |
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From Linda:
There are 12 people who can be chosen for a project. Q1. Suppose that 2 people refuse to work together. How many groups of 7 can be chosen to work on a project? Q2. Suppose that 2 people insist on working together or neither will work on the project. How many groups of 7 can be chosen to work on the project?
Answered by Penny Nom. |
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83.3% |
2001-12-03 |
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From Ellie:
Please explain how a percentage like 83.3% is changed into a fractions. The answer given is 5/6 and I changed 83.3% to a regular decimal of .833, which would be 833/1000. How do they get 5/6 from that? HELP
Answered by Chris Fisher. |
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Integers |
2001-12-02 |
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From Alison:
How do you use integers in your everday life?
Answered by Harley Weston. |
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Solving x^2-3x+5=0 |
2001-11-30 |
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From Katy:
How do you find the solution to x2-3x+5=0?
Answered by Penny Nom. |
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Can a infinite set be smaller than another infinite set? |
2001-11-29 |
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From Carlos:
Can a infinite set be smaller than another infinite set? If so why?
Answered by Chris Fisher and Penny Nom. |
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3, 6, 10, 15, 21 |
2001-11-29 |
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From Patrick:
we are trying to find the expression to solve for the nth term in the pattern 3, 6, 10, 15, 21
Answered by Denis Hanson. |
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A lighthouse and related rates |
2001-11-29 |
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From Melissa:
A lighthouse is located on a small island 3 km away from the nearest point P on a straight shoreline, and its light makes 4 revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?
Answered by Penny Nom. |
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