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Post New Question
All Questions
+0
230542 Questions
0
512
1
Help Please. Thank you.
Circle $A$ has its center at $A(4, 4)$ and has a radius of 4 units. Circle $B$ has its center at $B(12, 4)$ and has a radius of 4 units. What is the area of the gray region bound by the circles and the $x$-axis? Express your answer in terms of $\pi$.
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Guest
Dec 28, 2020
0
556
1
counting question
Alex has 5 pieces of paper, each with a different math problem. In how many ways can he give these problems to his 10 friends (he can give each friend more than one problem), if every friend must get at least one problem?
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Guest
Dec 28, 2020
0
691
4
hi :) some math
A circle is centered at O and has an area of 48*pi. Let Q and R be points on the circle, and let P be the circumcenter of triangle QRO. If P is contained in triangle QRO, and triangle PQR is equilateral, then
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Guest
Dec 28, 2020
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414
1
help please
Suppose of all possible ways to choose two representatives among 10 students in a class, there are exactly 30 different ways to choose one or more female as a representative. How many males are there in the class?
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Guest
Dec 28, 2020
0
564
1
coordinates
Circle O is centered at the point of origin with point P=(3,4) lying on it. The red line l : 3x + 4y - 7 = 0 intersects the circle at points A and B, as shown. What is the area of quadrilateral AOBP?
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Guest
Dec 28, 2020
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385
1
algebra
In the expansion of $(2x+\frac{k}{x})^8$, where k is a positive constant, the constant is 700000. Find k.
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Guest
Dec 28, 2020
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413
2
help with geo
ABCD is a rectangle. Find the length of AB.
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Guest
Dec 28, 2020
0
337
1
halp
Two circles have the same center C (Circles that have the same center are called concentric.) The larger circle has a radius 10 and the smaller circle has a radius 6 Determine the area of the ring between these two circles.
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Guest
Dec 28, 2020
+1
521
2
+365
Please Help thank you
Evaluate the infinite geometric series:
Thank You
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imdumb
Dec 28, 2020
0
654
1
probability
Without looking at the labels, Adrien placed four CDs in four cases. What is the probability that exactly one of the CDs is in the wrong case? Express your answer as a common fraction.
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Guest
Dec 28, 2020
-1
1368
2
Bus A and Bus B leave the bus depot at 6 am. Bus A takes 20 minutes to complete its route once and bus B takes 35 minutes to complete its ro
I WANT THE ANSWER PLEASE
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Guest
Dec 28, 2020
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303
1
Angle Bisector problem
In convex quadrilateral and Let P be the intersection of the perpendicular bisectors of and . Find and .
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Guest
Dec 28, 2020
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400
1
counting problem
The Smith family has 4 sons and 3 daughters. In how many ways can they be seated in a row of 7 chairs such that at least 2 girls are next to each other?
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Guest
Dec 28, 2020
0
338
0
help with probability
John has 12 marbles of different colors, including one red, one green, and one blue marble. In how many ways can he choose 5 marbles, if exactly one of the chosen marbles is red, green, or blue?
Guest
Dec 28, 2020
0
322
1
Pls help :)
Suppose that a and b are digits in base d > 6 such that .
Find in base d.
Thanks in advance!
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Guest
Dec 28, 2020
0
348
2
Find Y
[128-y] x 23 = 2346
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Guest
Dec 28, 2020
0
301
1
help plz
An equilateral triangle has sides of length 2 units. A second equilateral triangle is formed having sides that are of the length of the sides of the first triangle. A third equilateral triangle is formed having sides that are of the length of the sides
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Guest
Dec 28, 2020
+2
614
2
+1486
Trapezoid
AB and CD are parallel. The length of a chord AB is 7 cm. AD = BC = 3 cm. DC is the diameter of a circle O. Find radius DO.
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Dragan
Dec 28, 2020
0
421
1
Let p be a prime number between 40 and 60
Let p be a prime number between 40 and 60. What is the probability that p + 20 is also a prime number? Express your answer as a common fraction.
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Guest
Dec 28, 2020
+1
510
7
+614
please help! alg 2
What number must we add to 3-5i to get 2+7i ? Here, i^2=-1
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xxJenny1213xx
Dec 28, 2020
0
467
3
number theory
The sum of the positive divisors of a positive integer of the form 3p is equal to 600, where p is prime. What is p?
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Guest
Dec 28, 2020
0
1440
1
DeltaMath
At the beginning of a snowstorm, Sydney had 11 inches of snow on her lawn. The snow then began to fall at a constant rate of 0.5 inches per hour. Assuming no snow was melting, how much snow would Sydney have on her lawn 3 hours after the snow began to fall?
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Guest
Dec 28, 2020
0
402
1
Pls Help
Let $\omega$ be a complex number such that \[\omega + \frac{1}{\omega} = 1.\]Find all possible values of \[\omega^n + \frac{1}{\omega^n},\]where $n$ is a positive integer. Enter all possible values, separated by commas.
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Guest
Dec 28, 2020
0
428
1
help me find range
Find the range of the function h(x) = (5x^2 + 20x + 23)/(x^2 + 8x + 5).
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Guest
Dec 28, 2020
0
350
1
probability
I have 5 red plates and 4 blue plates. If I randomly select three plates to serve dinner on, what is the probability that they're all the same color?
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Guest
Dec 28, 2020
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