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Post New Question
All Questions
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231295 Questions
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480
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probability
How many ordered quadruples (a,b,c,d) satisfy a+b+c+d=18, where a,b,c,d are positive integers?
Guest
Jun 20, 2020
0
355
0
help
Let x, y be real numbers such that x^2 + y^2 + 1 = 2x. Find x^3 + y^5.
Guest
Jun 20, 2020
0
345
0
probability
A random card falls out of a standard deck of 52 cards. If you select a card from the remaining 51 cards randomly, what is the probability that it is a "7"?
Guest
Jun 20, 2020
0
361
0
help
In the square ABCD, E is the midpoint of AB. A line is drawn from E, perpendicular to CE, and intersecting AD at F.
Find the ratio of ∠BCF to ∠BCE.
read more ..
Guest
Jun 20, 2020
0
338
0
please help
On the regular grid below, four line segments form the pink square. What is its area?
Guest
Jun 20, 2020
0
431
2
help
In triangle PQR, PQ = 13, QR = 14, and PR = 15. Let M be the midpoint of QR. Find PM.
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Guest
Jun 20, 2020
0
1273
5
HELP!!! DUE TODAY
In the coordinate plane, A=(4,-1), B=(6,2), and C=(-1,2). There exists a point Q and a constant k such that for any point P,
PA^2 + PB^2 + PC^2 = 3PQ^2 + k
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Guest
Jun 20, 2020
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344
0
need help
Four congruent circles, each with radius 6 cm, intersect as shown (their centers are marked in purple). What is the perimeter of the entire figure (marked in red)?
read more ..
Guest
Jun 20, 2020
+3
1623
18
+1252
An idea to stop cheaters?
I have an idea to stop cheaters, or just people that dump homework and don't explain in general.
First, we could have a character minimum so people can explain what they've tried. In case some people try to get over the limit by typing
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off-topic
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CoolStuffYT
Jun 20, 2020
0
640
1
+80
Repeating decimals?
1. What is the 20th digit after the decimal point of the sum of the decimal equivalents for the fractions one-seventh and one-third?
2. Find the integer n, 0 n 180 such that
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Unicornrabbit
Jun 20, 2020
0
589
1
please help
In the diagram above, the sides of △ABC are tangent to the inscribed circle with radius c and center O at points E,D and F where BD = a and DC = b.
Let ab > c^2 and P be
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Guest
Jun 20, 2020
0
485
1
probability
Three boys and three girls are arranged at random in a row. What is the probability that all three boys are standing next to each other?
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Guest
Jun 20, 2020
0
554
1
help
a_n is a sequence such that
find
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Guest
Jun 20, 2020
0
404
1
20,June Sat:
June deposited $9000 in an account that pays 5.4% compound interest per year. Find the total amount of the account afterthe interest compounded.
(a)monthly
(b)half-yearly
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Guest
Jun 20, 2020
0
380
1
help
Solve for the missing area.
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Guest
Jun 20, 2020
0
341
0
Help
help me with this please all four
read more ..
Guest
Jun 20, 2020
0
514
2
help with geometry
The diagram shows a square PQRS inside a right-angled isoceles triangle ABC. PQ = QR = 2 cm. Find the area of the triangle ABC.
read more ..
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Guest
Jun 20, 2020
0
782
2
For what real values of k does the quadratic 12x^2 + kx + 27 = 0 have nonreal roots? Enter your answer as an interval.
For what real values of k does the quadratic 12x^2 + kx + 27 = 0 have nonreal roots? Enter your answer as an interval.
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Guest
Jun 20, 2020
0
665
1
help
Carly, who is 5 inches taller than her brother Bailey, casts a shadow that is a foot longer than his. If Carly is 50 inches tall, what is the length in inches of Bailey's shadow?
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Guest
Jun 20, 2020
0
466
1
help
If x - y = 3 and x^2 - y^2 = 63, then find x^2 + y^2.
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Guest
Jun 20, 2020
0
412
0
please help
A line is drawn from each corner of a large square to the point of trisection of the opposite side, as in the diagram.
If the shaded square has area 1, what is the area of the large square?
read more ..
Guest
Jun 20, 2020
0
460
1
can you explain?
What is the value of 1111111*8888888, the next line in the series?
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Guest
Jun 20, 2020
0
809
2
geometry hard problem!
In rectangle WXYZ, A is on side WX such that AX = 4, B is on side YZ such that BY = 18, and C is on side XY such that angle ACB= 90 degrees and CY = 2CX. Find AB.
read more ..
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Guest
Jun 20, 2020
0
598
3
+865
floor and ceiling help
Find all values of r such that
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AnimalMaster
Jun 20, 2020
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