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Post New Question
All Questions
+0
237665 Questions
0
591
1
help
There are 40 people in a room. All the people shake each other's hand once. (So if person 1 shook person 2's hand, person 2 shaking person 1's hand would not be a handshake.) How many handshakes occurred in all?
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Guest
May 24, 2020
0
620
1
+224
Can someone answer this question? It has no explanation in the answer
https://web2.0calc.com/questions/please-explain-this-geometry-question
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envoy
May 24, 2020
0
546
1
help
In triangle ABC, a = 11, b = 14, c = 21. Find cos A.
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Guest
May 24, 2020
0
538
1
help
Find the sum 101 + 102 + 103 + ... + 200.
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Guest
May 24, 2020
0
540
0
Convert r= 5/3sinθ−cosθ to rectangular form.
Convert r= 5/3sinθ−cosθ to rectangular form.
Enter your answer in slope-intercept form. Enter values so that fractions are simplified
Guest
May 24, 2020
0
517
0
p and q are complex numbers such that |p|=7√3 and |p+q|=12√2.
p and q are complex numbers such that |p|=7√3 and |p+q|=12√2.
On what interval must |q| fall on?
[12√2−7√3,∞)
[12√2+7√3,∞)
read more ..
Guest
May 24, 2020
0
558
0
Convert the rectangular coordinates (4√3,−4) to polar form. Let r>0 and 0≤θ<2π.
Convert the rectangular coordinates (4√3,−4) to polar form. Let r>0 and 0≤θ<2π.
Enter coordinates as simplifed fractions or radicals in simplest form.
Guest
May 24, 2020
0
504
2
help pls asap
If the point $(3,6)$ is on the graph of $y=g(x)$, and $h(x)=(g(x))^2$ for all $x$, then there is one point that must be on the graph of $y=h(x)$. What is the sum of the coordinates of that point?
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Guest
May 24, 2020
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470
1
help
See image.
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Guest
May 24, 2020
0
473
1
help!
How many times does the number "7" show in the list of numbers from 1 to 1000?
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Guest
May 24, 2020
0
435
0
can anyone help?
How many triangles are in this diagram?
Guest
May 24, 2020
0
491
1
help
Find the number of 8-digit numbers the sum whose digits is 4.
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Guest
May 24, 2020
0
738
5
+738
pLeasE pLeAse PLEASE hElP!!!!!
Find the number of paths from P to Q, where each step is to the right or up.
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lokiisnotdead
May 24, 2020
0
564
1
help
Simplify
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Guest
May 24, 2020
May 23, 2020
0
610
1
geometry
Point C divdies the semicircular arc AB of radius 10 in such a way that the product of chords AC and BC is 100. Find the central angles of the chords.
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Guest
May 23, 2020
0
472
1
help
Two of the numbers {1, 2, 3, ..., 100} are chosen at random. What is the probability that their sum is odd?
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Guest
May 23, 2020
+1
653
2
Please Help!
Find the six-digit number N such that when its digits are reversed, the result is equal to 4N.
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Guest
May 23, 2020
0
583
1
polynomial
The polynomial x^4 + 2x^3 - x + 1/4 can be written as the square of a polynomial p(x). Find p(x).
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Guest
May 23, 2020
0
428
0
Help with Number Theory!
Find all positive integers n, such that n/11 = the sum of the digits of n.
(One example of a number that works is 198, because the sum of the digits in 198 = 1+9+8 = 18, and 198/11 = 18.)
Guest
May 23, 2020
0
639
2
help
A fair coin is tossed five times. What is the probability that heads appears at least once?
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Guest
May 23, 2020
0
679
4
+70
Help would be greatly appreciated :)
Let a ,b,c and d be real numbers such that a > b and c > d Enter the letters of the statements below that must be true:
(A) a + c > b + d
(B) 2a + 3c > 2b + 3d
(C) a - c > b -
read more ..
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thesoccerfish
May 23, 2020
0
666
1
+20
I don't know how to do this...
A club with five men and six women wish to form a committee. The number of men must be between 1 and 3 (inclusive), and the number of women must be between 2 and 4 (inclusive). How many different committees can be formed?
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JaritoDaFrito
May 23, 2020
0
423
0
please help
A collection of nickels, dimes and pennies has an average value of 7¢ per coin. If a nickel were replaced by five pennies, the average would drop to 6¢ per coin. What is the number of dimes in the collection?
Guest
May 23, 2020
0
542
1
help
If two distinct members of the set {2, 4, 10, 12, 15, 20, 50} are randomly selected and multiplied, what is the probability that the product is a multiple of 100?
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Guest
May 23, 2020
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