All Questions ⁺⁰237826 Questions

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352

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3d geometry

Find the number of cubic centimeters in the volume of the cylinder formed by rotating a square with side length 14 centimeters about its diagonal. Express your answer in terms of pi.

Guest May 29, 2021

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437

4

geometry

Three circles of radius 1 are externally tangent to each other and internally tangent to a larger circle and externally tangent to a smaller circle. What is the radius of the smaller circle? Express your answer as a common fraction in simplest radical form. read more ..

Guest May 29, 2021

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416

3

Help

How many values of x between 0 and 100 exclusive, satisfy both of the following conditions?
1. x is a multiple of 4.
2. x is a multiple of 6.

Guest May 29, 2021

0

697

2

+75

help

How many 12-step paths are there from A to B, going one unit to the right or one unit up at each step? The path must be entirely along the lines of the grid, as was done read more ..

szastan May 29, 2021

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419

1

Algebra

Find the roots of x^2 + 12x + 36 = 25.

Guest May 29, 2021

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501

2

+75

math

A science teacher is arranging her books on a shelf. She has 4 Astronomy books, 3 Biology books, and 2 Chemistry books. How many ways can she arrange these books on the shelf if the books from each subject must be together?

szastan May 29, 2021

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512

2

+75

club question

Our club has 10 members, and we need to appoint a president, a vice-president, and a secretary. How many ways can we do this if:
(a) Each member can hold at most one office?
(b) Members can hold any number of offices?

szastan May 29, 2021

0

463

2

+75

help 1

Of the 30 students in my class, 11 practice taekwondo, 11 play piano, and 20 take lessons at MS. 4 students play piano and go to MS, 3 students do taekwondo and play piano, 5 students go to MS and practice taekwondo, and 3 students do none of these. How read more ..

szastan May 29, 2021

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481

2

In a rectangular coordinate system, the line 3y=x intersects the line 2x+5y at point A. What is the sum of the coordinates of point A?

In a rectangular coordinate system, the line 3y=x intersects the line 2x+5y at point A. What is the sum of the coordinates of point A?

Guest May 29, 2021

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669

2

How many multiples of 9 are between 100,000 and 100,185?

How many multiples of 9 are between 100,000 and 100,185?

Guest May 29, 2021

0

501

1

+75

help

The combination locks on the lockers at Hillside School have numbers from 0 through 39 (inclusive). A locker combination consists of three different numbers, where the order matters. Because of the way the locks are manufactured, all three numbers are even read more ..

ElectricPavlov ●

szastan May 29, 2021

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402

1

Quadratic

Find the smallest real value of x such that x^2 + 6x + 9 = 242.

ElectricPavlov ●

Guest May 29, 2021

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432

2

help algebra

Find all real solutions to 100x^2 + 20x + 1 = x^2 + 8x + 16.

Guest May 29, 2021

0

579

5

+876

Where I Went Wrong?

Greetings,
The problem goes like this:
Find all values of x+y, given
3x+5y-6z=2 read more ..

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MathProblemSolver101 May 29, 2021

+1

476

3

I need an answer asap, idk why my last post was flagged for moderators

The sum of three numbers $a, b$ and $c$ is 60. If we decrease $a$ by 7, we get the value $N$. If we increase $b$ by 7, we get the value $N$. If we multiply $c$ by 7, we also get the value $N$. What is the value of $N$?

Guest May 29, 2021

+1

1049

5

Evaluate the sum \[\frac{1}{3^1} + \frac{2}{3^2} + \frac{3}{3^3} + \cdots + \frac{k}{3^k} + \cdots \]

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Guest May 29, 2021

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493

1

The lines -2x + y =k and 0.5x +y = 14 intersect when x= -8.4. What is the value of k?

The lines -2x + y =k and 0.5x +y = 14 intersect when x= -8.4. What is the value of k?

Guest May 29, 2021

0

419

1

Algebra

Find all real values of that satisfy the equation (x^2 - 81)^2 = 324. If you find more than one, then list the values separated by commas.

Guest May 29, 2021

+1

670

2

+407

Help ASAP please

The dartboard in the diagram is composed of two concentric circles. The radius of the larger circle is twice as long as that of the smaller circle. The dartboard is further divided into four equal parts by two diameters of the larger circle. 200 darts read more ..

ss333 May 29, 2021

+1

488

2

+407

Help please!

Suppose you have a weighted coin in which heads comes up with probability 3/4 and tails with probability 1/4. If you flip heads, you win 2 dollars, but if you flip tails, you lose 1 dollar. What is the expected win of a coin flip in dollars? read more ..

ss333 May 29, 2021

+1

534

2

+407

Help Please!

An eight-sided die has its faces numbered from 1 to 8. What is the expected value of the roll of the die?

ElectricPavlov ●●

ss333 May 29, 2021

0

436

1

quadratic

For what real values of a is x^2 + ax + 625 the square of a binomial? If you find more than one, then list the values separated by commas.

ElectricPavlov ●

Guest May 29, 2021

0

440

1

quadratic

If x^2 - 77x + c = (x + a)^2 for some constants c and a, find a.

ElectricPavlov ●

Guest May 29, 2021

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