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Post New Question
All Questions
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230469 Questions
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583
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+421
Ant on a Cube...
An ant is on the face of a cube with edges measuring five centimeters. The ant starts one centimeter from an edge and two centimeters from another, and wishes to travel to a point on an edge one centimeter from the farthest vertex. What is the shortest
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Pangolin14
Dec 31, 2020
0
576
1
geometric math
P and Q are two points on line x - y + 1=0 and are at distance 5 units from the origin. Find the area of the triangle OPQ
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Guest
Dec 31, 2020
0
380
2
help pls
Let a, b, c be the roots of x^3 - x - 1 = 0. Compute
(1 + a)^2/(1 - a) + (1 + b)^2/(1 - b) + (1 + c)^2/(1 - c).
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Guest
Dec 31, 2020
0
427
1
tricky triangle
In triangle ABC, AB = 17, AC = 25, BC = 28, and I is the incenter. What is BI?
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Guest
Dec 31, 2020
0
1807
10
+36
1-100 QUESTION WITH DIGITS 2, 0, 2, 1 CPHILL (or anyone)
Hey, CPhill (or whoever reading this), remember that 1-100 with only 2,0,2,1 question I posted? Well, I have gotten some progress on it...
1 = 2 + 0 - 2 + 1
2 = (2 + 0) / 2 + 1
3 = 2^2 - 1 - 0
read more ..
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Karinger
Dec 31, 2020
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328
1
help algebra
The sum of two numbers is 16 and their product is 36. Find the reciprocal of the sum of the two numbers.
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Guest
Dec 31, 2020
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415
0
+36
1-100 QUESTION I POSTED EARLIER
Hey CPhill, remember the question that I posted earlier, finding 1-100 with 2,0,2,1? Well, I've gotten some progress with that..
1 = 2 + 0 - 2 + 1
2 = (2 + 0) / 2 + 1
3 = 2^2 - 1 - 0
read more ..
Karinger
Dec 31, 2020
0
430
4
isosceles trapezoid
A isosceles trapezoid has bases \(AB=15\) and \(CD=20\). Points \(E\) and \(F\) are on \(AD\) and \(BC\) respectively such that \(EF\parallel AB\). If \(AE:ED=2:3\), compute \(EF\).
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Guest
Dec 31, 2020
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456
3
I thought I was smart till I saw this
Let x = What is
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Guest
Dec 31, 2020
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567
3
Trigonometric Identities
Find the measure, in degrees, of the smallest positive angle $\theta$ for which $\sin 3 \theta = \cos 7 \theta.$
My go at it:
Using the theorem for sin and cosine relationship,
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Guest
Dec 31, 2020
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309
1
geometry question
Circle O with radius 2 is inscribed in a trapezoid ABCD such that AD is parallel to BC and CD = 8. If angle A and angle B are right angles, then what is the area of ABCD?
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Guest
Dec 31, 2020
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1
482
1
closed form
Find a closed form for the sum S = 1*1! + 2*2! + 3*3! + ... + n*n!.
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Guest
Dec 31, 2020
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422
3
number theory question
In the prime factorization of 109!, what is the exponent of 7? (Reminder: The number n! is the product of the integers from 1 to n. For example, 5! = 5 * 4 * 3 * 2* 1 = 120.)
catmg
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Guest
Dec 31, 2020
Dec 30, 2020
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403
2
Need help.
Brandon and Pat drove from Edmonton to Saskatoon, a distance of 545km. Brandon drove the first part of the trip at an average speed of 100 km/h and Pat drove the remainder at an average speed of 90 km/h. If the trip took Brandon and Pat 5.75 h, determine
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Guest
Dec 30, 2020
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380
1
permutations
Let S be the set of permutations of (1,2,3,4,5,6) whose first term is not 1. If we choose a permutation at random from S, what is the probability that the third term is equal to 3, and the fourth term is equal to 4?
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Guest
Dec 30, 2020
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387
1
3d geo
What is the dihedral angle between two adjacent faces of an octahedron?
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Guest
Dec 30, 2020
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389
1
help plz
Three schools have a chess tournament. Four players come from each school. Each player plays three games against each player from the other schools. How many games of chess are played?
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Guest
Dec 30, 2020
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399
1
triangle geo
ABC is a right angled triangle with ∠B=90∘. M is the midpoint of AC and BM=sqrt(117). Sum of the lengths of the other two sides AB and BC is 30. Find the area of the triangle ABC.
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Guest
Dec 30, 2020
0
486
3
number theory
Find the remainder when 5^30 is divided by 8.
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Guest
Dec 30, 2020
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401
1
base numbers
In base b, there are exactly one hundred and eighty three-digit numbers whose digits are all distinct. (That's "one hundred" in the ordinary sense, 100_10.) What is b?
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Guest
Dec 30, 2020
0
384
1
Help with Geo
Polyhedron P is inscribed in a sphere of radius (meaning that all vertices of P lie on the sphere surface). What is the least upper bound on the ratio In other words, what is the smallest real number such that must be true
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Guest
Dec 30, 2020
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395
1
coordinate geometry
a,b,c are real constants such that all the lines represented by ax+by+c=0 are concurrent at a point P. This point P lies on the line ax+by+c=0 such that 7a+2b+8c=0. What are the coordinates of P?
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Guest
Dec 30, 2020
0
1
420
2
confused by algebra
The teacher has written a quadratic on the board, but Heather can't read the linear term. She can see that the quadratic term is 4x^2 and that the constant is -24. She asks her neighbor, Noel, what the linear term is. Noel decides to tease her and just
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Guest
Dec 30, 2020
0
1
427
1
rate problem
Jack walked up a hill at a speed of x^2 - 11x - 22 miles per hour. Meanwhile, Jill walked a total distance of x^2 - 3x - 54 miles in x - 9 hours. If Jack and Jill walked at the same speed, what is that speed, in miles per hour?
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Guest
Dec 30, 2020
0
316
1
Please help
What number must be placed in the box in the equation below to produce an equation that has more than one solution: 4x+6+7x-9=12x-7-x+blank?
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Guest
Dec 30, 2020
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