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Post New Question
All Questions
+0
237722 Questions
0
741
4
help
What is the residue modulo 13 of the sum of the modulo 13 inverses of the first 12 positive integers?
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Guest
Dec 16, 2019
0
626
1
How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4x4 square array of dots?
How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4x4 square array of dots?
Two triangles are congruent if they have the same traced outline, possibly up to rotating and flipping.
read more ..
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Guest
Dec 16, 2019
0
576
1
help
Piont C lies on a circle one of whose diameter is AB. The bisector of angle CAB intersects BC at D and intersects the circle at E. If BD = 25 and CD = 7, find BE.
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Guest
Dec 16, 2019
0
567
1
help
If and , then find in terms of a and b.
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Guest
Dec 16, 2019
0
1006
3
help
Find the numerical value of sin (40) sin (80) + sin(80) sin (160) + sin (160) sin (320). (All angles are in degrees.)
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Guest
Dec 16, 2019
0
666
1
I don't know how to approach this
There are 10 chairs in a circle, labelled from 1 to 10. Find the number of ways of choosing 3 of these chairs, so that no two chosen chairs are adjacent.
I know how to do this in a row but because this is a circle, i don't know how to account
read more ..
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Guest
Dec 16, 2019
-1
908
2
+1662
help
Four unit circles surround a smaller circle. Find the radius of the smaller circle.
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wiseowl
Dec 16, 2019
-1
909
1
+1662
help
Points (-1,-3) and (5,1) are the endpoints of a diameter of a circle. What is the equation of the circle?
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wiseowl
Dec 16, 2019
-1
768
1
+1662
help
The circle x^2 + y^2 + Ax + By + C = 0 passes through the origin, and has the same center as the circle x^2 + y^2 - 4x + 6y - 3 = 0. What is A + B + C?
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wiseowl
Dec 16, 2019
0
574
1
Help please
The spherical coordinates of (-3, 4, -12) are . Find
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Guest
Dec 16, 2019
-2
996
4
+30
/gone
/gone
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whoisjoe
Dec 16, 2019
Dec 15, 2019
+1
478
1
Please help
The graph of is shown below.
If we plot the graph of for , then what is the smallest value of M that still produces
read more ..
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Guest
Dec 15, 2019
+1
862
1
+308
help
P, Q, and R are prime numbers such that 3P + 7Q + 15R = 102. What is Q?
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notsmart2.0
Dec 15, 2019
-1
795
2
+318
Pre Calc
Simplify logbase2 (8/sq rt 32).
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mharrigan920
Dec 15, 2019
0
1226
2
+308
HELP
If Joelle multiplied 792 by a positive integer and came up with a perfect square as her answer, then what is the smallest integer she could have multiplied 792 by?
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notsmart2.0
Dec 15, 2019
0
561
1
Two Questions about Trapezoids
Hi, I needed some help with these two trapezoid questions I couldn't understand.
1) ABCD is a trapezoid with bases AB and DC. We know that Angle C=60 Degrees and Angle D=45 Degrees. If AB=5-2sqrt3 and BC=4, what is
read more ..
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Guest
Dec 15, 2019
0
1324
1
help
A 5 ltr bucket of water is taken from a swamp. The water contains 75 mosquito larvae. A 200mL flask of water is taken from the bucket for further analysis. What is the probability that the flask contains at least one mosquito
read more ..
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Guest
Dec 15, 2019
0
450
1
help
A function is defined on the complex numbers by where and are positive real numbers. Each point in the image of is equidistant from the point and the origin. Given that find and
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Guest
Dec 15, 2019
-1
788
1
+318
Pre Calc
Given f(x) = x^2−1/ 1−x
and g(x) = x + 2. Find and simplify f(g(2))−g(f(2)).
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mharrigan920
Dec 15, 2019
+1
1233
1
+308
help
What is the largest prime number in the ten-number list 37,3737,373737,...,37373737373737373737
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notsmart2.0
Dec 15, 2019
0
628
5
help
Let and be real numbers. The complex number is a root of the quadratic What is the other root?
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Guest
Dec 15, 2019
-1
805
5
+30
/gone
/gone
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whoisjoe
Dec 15, 2019
0
631
1
+262
help!
Suppose that the least common multiple of the first 25 positive integers is equal to 26A7114B4C0. Find 100 * A + 10 * B + C.
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atlas9
Dec 15, 2019
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