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Post New Question
All Questions
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230627 Questions
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624
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+4
If the person who posted the 6 cars in 3 lanes problem (august 2019) is still looking for an answer, I have it.
We count the number of ways that some lane can be left empty, and subtract from the total:
Each driver has three choices, so it's .
Now, we count the ways where at least 1 lane is left empty:
But we have double-counted the
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ij130063
Jan 10, 2020
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1646
1
What is the solution to f(x)=g(x) ?
I need help please and thank ASAP!!!
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Guest
Jan 10, 2020
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476
1
help
If xy(x + y) = 1, then find
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Guest
Jan 10, 2020
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588
4
no more than one third of a number is negative 2
no more than one third of a number is negative 2
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Guest
Jan 10, 2020
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416
1
help
If 4^x - 4^(x - 1) = 24, then find (2x)^x.
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Guest
Jan 10, 2020
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1041
3
+261
help!
How many positive two-digit integers are there in which each of the two digits is prime?
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atlas9
Jan 10, 2020
Jan 9, 2020
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406
1
help
Solve 1/(8!) + 1/(9!) = x/(10!).
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Guest
Jan 9, 2020
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753
2
+1495
hey people
hey people....long time no see
off-topic
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ManuelBautista2019
Jan 9, 2020
0
437
1
Math
daniel is flying a kite with an angle of elevation 40 degrees. all 80 ft of string have been let out. if there is no sag in the string. find the height of the kite
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Guest
Jan 9, 2020
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1239
1
How many times is 5× 10 6 5×106 larger than 5× 10 4 5×104 ?
How many times is 5× 10 6 5×106 larger than 5× 10 4 5×104 ?
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Guest
Jan 9, 2020
0
600
1
help
Solve ABCDE * 9 = EDCBA, where every letter stands for a digit.
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Guest
Jan 9, 2020
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545
1
help
If the midpoints of the sides AB and AC of triangle ABC are (3,5) and (-3,-3), respectively, then find the length of BC.
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Guest
Jan 9, 2020
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1176
3
geometry question about circles
A regular dodecagon is inscribed in a circle with radius 1.
Compute
(The sum includes all terms of the form , where )
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Guest
Jan 9, 2020
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442
1
i need help
The diameter of the circle above is 96 cm. What is the circumference of the circle? (Use = 3.14.)
off-topic
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Guest
Jan 9, 2020
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559
1
help
What are the last two digits of 123456789 * 987654321?
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Guest
Jan 9, 2020
0
479
1
help
n aeroplane is flying horizontally at a height 3150 mt. above a horizontal plane ground. At a particular instant, it passes another aeroplane vertically below it. At this instant, the angles of elevation of the planes from a point on the ground are 30 degrees
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Guest
Jan 9, 2020
0
486
4
physics questions- need help!!!
#1
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off-topic
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Guest
Jan 9, 2020
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931
3
I do not understand.
Lance has a regular heptagon (7-sided figure). How many distinct ways can he label the vertices of the heptagon with the letters in OCTAGON if the N cannot be next to an O? Rotations of the same labeling are
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Guest
Jan 9, 2020
0
615
1
help
Points A = (0,5) and B = (10,13) are joined to form line segment AB. If point P = (x,y) divides AB in the ratio 3:1 externally, then what is x + y?
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Guest
Jan 9, 2020
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465
1
math
.5 / _ =4
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Guest
Jan 9, 2020
0
502
1
help
A particle starts at (0,0) and moves at each step one unit in either the positive x or y direction. The probability that it will move in the x direction is p. If the probability that the particle passes through the point (3,1) is 16 times as
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Guest
Jan 9, 2020
0
483
1
help
The figure shows three consecutive squares of sides 5, 4 and 3, respectively.
Find the area of the black region.
read more ..
ElectricPavlov
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Guest
Jan 9, 2020
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459
1
help
How many words,with or without meaning, each of 3 vowels and 2 consonants canbe formed from the letters of the word INVOLUTE?
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Guest
Jan 9, 2020
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715
2
Needing some help..
1. Which expression is equal to 7ab^5/56a^3b^2 ?
A. 8b^3/a^2
B. 8a^3/b^2
C. b^3/8a^3
D. b^3/8a^2 <#> 2. Which expression is equal to (x−3)(x−2)/(x+3)(x−3) ? <#> A x−3/x+3 <#> B. x−2/x−3 <#> C. x−2/x+3 <#> D. x+2/x+3
3.
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Guest
Jan 9, 2020
0
332
0
help
A rectangular solid block of wood is 6 by M by N, where M > N are positive integers. The outside surface of the block is painted, and the block is then cut into 6MN unit cubes. Exactly half of the unit cubes have no paint at all on them.
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Guest
Jan 9, 2020
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