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Post New Question
All Questions
+0
229750 Questions
0
1301
1
+295
Three couples go to the movie theater.
Three couples go to the movie theater. They want to seat people together for maximum enjoyment, but instead they randomly file into a row with six seats. What is the probability that they sit in a socially optimal configuration, in which each person is
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Darkside
Sep 3, 2018
0
1682
1
+295
What is the probability that a two-digit number .
What is the probability that a two-digit number selected at random has a tens digit less than its units digit? Express your answer as a common fraction.
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Darkside
Sep 3, 2018
0
1683
2
+295
My state's lottery has 30 white balls numbered from 1 through 30 and 20 red balls numbered from 1 through 20.
My state's lottery has 30 white balls numbered from 1 through 30 and 20 red balls numbered from 1 through 20. In each lottery drawing, 3 of the white balls and 2 of the red balls are drawn. To win, you must match all 3 white balls and both red balls, without
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Darkside
Sep 3, 2018
+1
2158
1
+295
A library has six identical copies of a certain book.
A library has six identical copies of a certain book. At any given time, some of these copies are at the library and some are checked out. How many different ways are there for some of the books to be in the library and the rest to be checked out if at
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Darkside
Sep 3, 2018
+1
853
1
+295
A library has six identical copies of a certain book.
A library has six identical copies of a certain book. At any given time, some of these copies are at the library and some are checked out. How many different ways are there for some of the books to be in the library and the rest to be checked out if at
read more ..
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Darkside
Sep 3, 2018
+1
1605
1
+295
DARKSIDE
There are six clearly distinguishable frogs sitting in a row. Two are green, three are red, and one is blue. Green frogs refuse to sit next to the red frogs, for they are highly poisonous. In how many ways can the frogs be arranged?
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Darkside
Sep 3, 2018
+1
2895
1
+295
HELP
The perfect squares from 1 through 2500 inclusive, are printed in a sequence of digits 1491625.....2500 How many digits are in the sequence?
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Darkside
Sep 3, 2018
+2
1
3962
1
+295
In how many ways can 8 people be seated in a row of chairs if three of the people
In how many ways can 8 people be seated in a row of chairs if three of the people, John, Wilma and Paul, refuse to sit in three consecutive seats?
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Darkside
Sep 3, 2018
+1
706
1
+295
How many 4-letter words with at least one vowel can be constructed
How many 4-letter words with at least one vowel can be constructed from the letters A, B, C, D, and E? (Note that A and E are vowels, any word is valid, not just English language words, and letters may be used more than once.)
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Darkside
Sep 3, 2018
0
1112
2
+1242
help!
It took Lara five days to read a novel. Each day after the first day, Lara read half as many pages as the day before. If the novel was 248 pages long, how many pages did she read on the first day?
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Lightning
Sep 3, 2018
0
526
1
+1242
Help!
Sequence A is a geometric sequence. Sequence B is an arithmetic sequence. Each sequence stops as soon as one of its terms is greater than 300. What is the least positive difference between a number selected from sequence A and a number
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Lightning
Sep 3, 2018
-2
1321
1
+71
The volume (in cubic meters)(show work)
The volume (in cubic meters), V, of a rectangular room is given by the expression:
v = 7b^4-28
Where b is a positive integer and each dimension is a positive integer too. What are three unique expressions that could represent the
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Mathrules
Sep 3, 2018
0
2643
1
+4
counting question
Elodie is putting on a fashion show and has five fabulous outfits for her five fabulous fashion models. However, on the day of the show, two of the outfits were ruined in an unfortunate permanent marker incident. Regardless, the show must go on and the
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Sombrero
Sep 3, 2018
+1
1304
1
+884
proper
To express 20 as a sum of different powers of 2, we would write . The sum of the exponents of these powers is . If 400 were expressed as a sum of at least two distinct powers of 2, what would be the least possible sum of the exponents
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ant101
Sep 3, 2018
0
967
2
+653
Help
If x^2 + y^2 +1/2 = x + y, find x^y+y^x
If |x|=3x+1, find (64x^2+48x+9)^2018
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supermanaccz
Sep 3, 2018
Sep 2, 2018
+1
759
1
+87
help
Week 8, I believe (a) is 6, but not sure
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rrahh
Sep 2, 2018
0
1070
3
Help asap
Compute the sum of
$$\frac{2}{1 \cdot 2 \cdot 3} + \frac{2}{2 \cdot 3 \cdot 4} + \frac{2}{3 \cdot 4 \cdot 5} + \cdots$$
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Guest
Sep 2, 2018
0
1359
1
Math Help
I want to choose a license plate which is 3 characters long, where the first character is a letter, the last character is a digit, and the middle is either a letter or a digit. I also want there to be two characters on my license plate which are the same.
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Guest
Sep 2, 2018
0
1960
1
Pls Help!!!!
Compute $1 - 2 + 3 - 4 + \dots + 2005 - 2006 + 2007$
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Guest
Sep 2, 2018
0
836
1
Find the measurment of both complemetary angles if one of them is 3 times less than the other
Find the measurment of both complemetary angles if one of them is 3 times less than the other
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Guest
Sep 2, 2018
0
465
0
+59
Help I keep getting these two wrong...
Help I keep getting these two wrong...
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slim22
Sep 2, 2018
0
440
0
+59
Help
Help
slim22
Sep 2, 2018
0
658
0
+394
help with this formula
Use a formula to find the surface area of each polyhedron described.
(a) a rectangular prism that is 4 feet wide, as tall as it is wide, and twice as long as it is tall
_____ ft2
(b) a regular hexagonal
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ladiikeiii
Sep 2, 2018
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