All Questions

708

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 read more ..

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ij130063 Jan 10, 2020

1742

What is the solution to f(x)=g(x) ?

I need help please and thank ASAP!!!

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Guest Jan 10, 2020

573

help

If xy(x + y) = 1, then find

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Guest Jan 10, 2020

677

no more than one third of a number is negative 2

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Guest Jan 10, 2020

520

help

If 4^x - 4^(x - 1) = 24, then find (2x)^x.

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Guest Jan 10, 2020

1109

+262

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

500

help

Solve 1/(8!) + 1/(9!) = x/(10!).

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Guest Jan 9, 2020

-1

854

+1495

hey people

hey people....long time no see

off-topic

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ManuelBautista2019 Jan 9, 2020

532

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

1332

How many times is 5× 10 6 5×106 larger than 5× 10 4 5×104 ?

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Guest Jan 9, 2020

707

help

Solve ABCDE * 9 = EDCBA, where every letter stands for a digit.

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Guest Jan 9, 2020

638

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

1274

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

534

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

663

help

What are the last two digits of 123456789 * 987654321?

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Guest Jan 9, 2020

571

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 read more ..

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Guest Jan 9, 2020

586

physics questions- need help!!!

#1

read more ..

off-topic

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Guest Jan 9, 2020

1043

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 read more ..

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Guest Jan 9, 2020

704

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

571

math

.5 / _ =4

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Guest Jan 9, 2020

603

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 read more ..

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Guest Jan 9, 2020

584

help

The figure shows three consecutive squares of sides 5, 4 and 3, respectively.
Find the area of the black region.

read more ..

ElectricPavlov ●

Guest Jan 9, 2020

561

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

814

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. read more ..

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Guest Jan 9, 2020

426

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. read more ..

Guest Jan 9, 2020

All Questions ⁺⁰237795 Questions

If the person who posted the 6 cars in 3 lanes problem (august 2019) is still looking for an answer, I have it.

What is the solution to f(x)=g(x) ?

help

no more than one third of a number is negative 2

help

help!

help

hey people

Math

How many times is 5× 10 6 5×106 larger than 5× 10 4 5×104 ?

help

help

geometry question about circles

i need help

help

help

physics questions- need help!!!

I do not understand.

help

math

help

help

help

Needing some help..

help

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