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Post New Question
All Questions
+0
230662 Questions
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691
1
help
In triangle ABC, BC = 6. Point E is on AC so that angle CEB is 80 degrees. Point D is on AB so that angle BDC is 100 degrees. The bisectors of angles ECD and DBE intersect at F. Find the numerical value of CF^2 + FB^2.
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Guest
Dec 18, 2019
0
644
1
help
The real roots of 2x^3 - 7x^2 + kx - 2 = 0 are in geometric progression. Find these three roots.
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Guest
Dec 18, 2019
+1
1746
2
Help! thx!
Find all integers $n$ such that the quadratic $7x^2 + nx - 11$ can be expressed as the product of two linear factors with integer coefficients.
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Guest
Dec 18, 2019
0
587
3
help
If (sqrt(2) + 1)^{99} = N + r, where N is a positive integer and 0 < r < 1, then find (N + r)r.
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Guest
Dec 18, 2019
0
649
1
help
In a polar coordinate system, the vertices of a triangle are at (6,30 degrees), (2, 90 degrees), and (4, 150 degrees). Find the area of this triangle.
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Guest
Dec 18, 2019
0
312
0
help
Let b be the largest number such that a rectangle with sides of lengths 1 and b will fit into a unit square so that the sides of the rectangle are not parallel to the sides of the square. Find b.
Guest
Dec 18, 2019
0
592
3
help
Both M and N are 3-digit numbers, and M/N is an integer. What is the largest possible value of M/N?
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Guest
Dec 18, 2019
0
806
4
help
Find the number of equilateral triangles in the grid.
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Guest
Dec 18, 2019
0
859
1
+296
Even More Geometry
Rectangle ABCD is cut by two lines as shown. Find the area of AEXH.
https://latex.artofproblemsolving.com/6/6/c/66cb67543703cafc48a84fd49998af9ddbc7d9c1.png
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EpicWater
Dec 18, 2019
0
673
1
help
If sin(x) + cos(x) = 1/2, find sin(x)^3 + cos(x)^3.
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Guest
Dec 18, 2019
0
891
1
+296
Geometry
The area of trapezoids ABEC, ABFD, and ABFC are 133, 140, and 161 square feet, respectively. Quadrilateral ABED is a rectangle. The length of segment DE is 8 feet. What is the length of segment CF?
https://latex.artofproblemsolving.com/0/f/f/0ff801c98054c45ce4a7974db31d7c1c0fe19fd8.png
read more ..
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EpicWater
Dec 18, 2019
Dec 17, 2019
0
815
1
+4
Geometry Proof! Help me please!
Circles S and T have radii 1, and intersect at A and B. The distance between their centers is square root of 2. Let P be a point on major arc AB of circle S, and let PA and PB intersect circle T again at C and D, respectively.
read more ..
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GeometryHelp
Dec 17, 2019
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548
1
+4
Help me with addition
Hi everyone i am in 3rd standard.
i do not understand the additino, my mother said to looo k onli ne
can yo u halp me?
this is proble:m
read more ..
ElectricPavlov
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MathNewbie
Dec 17, 2019
0
469
2
help
Simplify sin(105) + cos(105). (All angles are in degrees.)
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Guest
Dec 17, 2019
0
352
1
help
Let a and b be positive integers such that 1/2 + 1/a = 1/3 + 1/b. Find all possible pairs (a,b).
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Guest
Dec 17, 2019
0
443
1
help
If a + b = 7 and ab = -18, then find a^3 + b^3.
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Guest
Dec 17, 2019
0
666
2
+78
Matrices HELP
Please help with this question...
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jesshobbs
Dec 17, 2019
0
518
1
ازاى احول الزاوية الى درجات ودقائق وثوانى
ازاى احول الزاوية الى درجات ودقائق وثوانى
Translation
How to convert angle to degrees, minutes and seconds
read more ..
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Guest
Dec 17, 2019
0
1787
1
help! Exponential and Logarithmic Equations
A sample originally contains 16 grams of a radioactive isotope. After 36 days, 14.8 grams of the isotope remain in the sample.
What is the half-life of the isotope?
Enter your answer in the box. Round your answer to the nearest day.
read more ..
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Guest
Dec 17, 2019
0
1183
1
plz help, thx!
A line segment begins at $(2, 5)$. It is 10 units long and ends at the point $(-6, y)$ where $y > 0$. What is the value of $y$?
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Guest
Dec 17, 2019
0
492
2
help
Find the maximum value of 4*sin(x)^2 - 12*sin(x) + 7.
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Guest
Dec 17, 2019
0
707
2
+78
Practical Math Help?
Find the first four terms of the arithmetic sequence where a1 = 2 and d = 5.
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jesshobbs
Dec 17, 2019
0
641
1
help
If a and b are the roots of x^2 - 4x + 1 = 0, find a^3 + b^3.
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Guest
Dec 17, 2019
0
487
1
help
Find all integers $n$ such that the quadratic $7x^2 + nx - 11$ can be expressed as the product of two linear factors with integer coefficients.
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Guest
Dec 17, 2019
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