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License plates |
2008-11-17 |
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From Clayton:
Okay, so in this situation a license plate must have four letters (A-Z) and four numbers (0-9), ex. ABCD-1234, where repeating a letter or number is allowed ex. AAAA-1234, or ABCD-1111, or AAAA-1111. The order of letters first numbers second, or number first, letters second is allowable, and each state has its own plates, so ABCD-1234 from New York, and ABCD-1234 from Minnesota are considered different combinations, how many different license plates could there be?
Answered by Penny Nom. |
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A triangle inscribed in a circle |
2008-11-17 |
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From Wanda:
I have the same question that you guys answered 2007-03-02. I need more clarification. I UNDERSTAND how to get the radius=3, I get that it is an equilateral triangle so each vertex is 60 degrees, I get that area of triangle is 1/2 bh.
I DO NOT understand why we multiply area X 3 , or how to calculate the values of base and height. Please explain a little further. Thanks.
Wanda
Answered by Penny Nom. |
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A question about primes and polynomials |
2008-11-16 |
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From Andrew:
Is it possible for (a^2 - a.b + b^2) to be divisible by a prime p where
b > a > p and a, b, and p are relatively prime? I let a = n.p + x and
b = m.p + y (where both x and y are < p) and after dividing throughout
by p one gets to decide whether (x^2 - x.y + y^2) ==0 mod(p) ?! It seems
unlikely unless p = (x^2 - x.y + y^2)? (Note:- All letters represent positive
integers.)
Answered by Chris Fisher and Victoria West. |
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A word problem about a regular pentagon |
2008-11-16 |
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From Sandra:
If the area of a regular pentagon is A=1.720a^2, in which a is one of the sides. Find the area of a regular pentagon with a side that measures 50cm.
Answered by Chris Fisher and Penny Nom. |
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A game for 5 players |
2008-11-16 |
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From safdar:
five players agreed that after every game, the loser doubles every body's money. they played 5 games and everybody lost once. after the 5 games, everybody had 4128. How much money did each of the players have before the game? show your work.
Answered by Janice Cotcher and Harley Weston. |
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The nth term of a sequence |
2008-11-16 |
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From Robin:
How do I solve for the next term in the following sequence, I just don't want the answer...I want how to do it to. x,x -1, x -2
Also, how do I solve for the nth term? I can't understand the explanations I've found. He has numbers subscripted in his equations.
Answered by Victoria West. |
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Area of a Decagon |
2008-11-15 |
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From preethi:
what is the formulae of decagon?
Answered by Janice Cotcher. |
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Probability and a pill bottle |
2008-11-15 |
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From Dana:
If a pill bottle contains either a clonazepam or clonidine pill and
then a clonidine pill is added & the botttle is shaken up and a
clonidine pill is "dumped" out, what are the chances a clonazepam pill
remains in the bottle?
Answered by Stephen La Rocque. |
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Two cubic yards, 4 inches deep |
2008-11-15 |
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From Donna:
How many square feet will 2 cubic yards cover if the depth is 4 inches?
Answered by Stephen La Rocque. |
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A group of people |
2008-11-15 |
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From Michael:
In a group of people,
if 20% of the people are 18-34 years of age, and 30% of the people
are 25-54 years of age.
What are the percentages of people 18-24,25-34,35-54 and other?
Thank you - Mike
Answered by Chris Fisher. |
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The midpoint o a line segment |
2008-11-15 |
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From Jane:
The vertices of a triangle are at (1,7), (6,-1) and (0,3). Find the coordinates of the midpoints of the sides.
Answered by Penny Nom. |
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The diagonals of an isosceles trapezoid |
2008-11-14 |
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From hazel:
how to solve the diagonals of an isosceles trapezoid? what is the formula?
Answered by Harley Weston. |
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A ratio to a decimal |
2008-11-14 |
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From manny:
Express 22 : 5 as a decimal. Round to the nearest hundredth
Answered by Penny Nom. |
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Choosing light bulbs from a box |
2008-11-14 |
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From Annie:
A box of light bulbs contains 3 bulbs, two bulbs are defective.
What is the probability of choosing a non-defective bulb and a defective bulb in 2 draws?
What is the probability of choosing 3 defective bulbs followed by a non defective bulb?
What is the probability of choosing first 2 non defective bulbs followed by a defective bulb?
Answered by Penny Nom. |
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Multiplication |
2008-11-14 |
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From natalie:
what is 8 times 30
Answered by Penny Nom. |
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