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Post New Question
All Questions
+0
230662 Questions
0
75
1
counting
In how many ways can the numbers 1 through 5 be entered once each into the five boxes below so that all the given inequalities are true?
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Guest
Mar 16, 2023
0
65
0
geometry
In triangle ABC, the angle bisector of angle BAC meets AC at D. If angle BAC = 60, angle ABC = 60, and AD = 24, then find the area of triangle ABC.
Guest
Mar 16, 2023
0
64
0
counting
In how many ways can three pairs of siblings from different families be seated in two rows of three chairs, if siblings may sit next to each other in the same row, but no child may sit directly in front of their sibling?
Guest
Mar 16, 2023
0
68
0
counting
At a meeting, five scientists, two mathematicians, five journalists, two biologists, and three politicians are to be seated around a circular table. How many different arrangements are possible if the scientists must all sit together (in
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Guest
Mar 16, 2023
0
65
0
geometry
In tetrahedron ABCO, angle AOB = angle AOC = angle BOC = 90^\circ. A cube is inscribed in the tetrahedron so that one of its vertices is at O, and the opposite vertex lies on face ABC. Let OA = 1, OB = 1, OC = 1. Show that the
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Guest
Mar 16, 2023
0
66
1
geometry
In triangle PQR, let M be the midpoint of QR, let N be the midpoint of PR, and let O be the intersection of QN and RM, as shown. If QN perp PR, QN = 12, and PR = 14, then find the area of triangle PQR.
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Guest
Mar 16, 2023
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62
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Probability
Need help with probability
My sock drawer contains two red socks, two white socks, and two blue socks. For three days in a row, I pull out two socks out of my sock drawer at random. What is the probability that I get matching
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Guest
Mar 16, 2023
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64
0
Geometry
Let ABC be a right triangle, and let H be the point on side AB so that CH is perpendicular to AB. Prove that (x + h)^2*(y + h)^2 = (a + b)^4.
Guest
Mar 16, 2023
0
64
0
Counting
Plz help
A standard six-sided die is rolled 7 times. You are told that among the rolls, there was one 1, two 2's, and three 4's. How many possible sequences of rolls could there have been? (For example, 5, 1, 2, 2,
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Guest
Mar 16, 2023
0
71
1
Father and Son
The sum of the present ages of the father and son is 80 years. When the father’s age was equal to the present age of the son, the sum of their ages was 40 years. What are their present ages?
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Guest
Mar 16, 2023
0
64
0
Stats
A list of ten distinct, positive integers has a median of 5.5. What is the smallest possible average of the ten positive integers? Explain your ansswer in complete sentences.
Guest
Mar 16, 2023
0
73
0
Geometry
Let B, A, and D be three consecutive vertices of a regular -gon. A regular heptagon is constructed on AB with a vertex C next to A Find angle BCD in degrees.
Guest
Mar 16, 2023
0
77
1
+1347
Looking for help
Can anyone give me some guidance on this?
Sam writes down the numbers 1, 2, 3, ..., 99
(a) How many digits did Sam write, in total?
(b) Sam chooses one of the digits written down, at random. What is the probability
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sandwich
Mar 16, 2023
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70
1
Algebra
Help I don't know the formula
Chuck deposits $2000 into a bank account that compounds annually at an interest rate of . Assuming there are no other transactions, what will the balance be after years, in dollars?
Chuck
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Guest
Mar 16, 2023
0
79
1
Probability
What do I do
Right triangle XYZ has legs of length XY = 12 and YZ = 6. Point D is chosen at random within the triangle XYZ. What is the probability that the area of triangle XYD is at most 20?
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Guest
Mar 16, 2023
0
79
1
+132
Help Please with Exponential Form!
If I have z^n = (z + 1)^n = 1 from which I derived |z| = |z+1| = 1, how can I find all the possible values of z in exponential form? So far I have |z|^n = 1 is e^{(2\pi i)/n} for n^{th} roots of unity. Is that on the right track? I don't even know how to
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Saphia1123
Mar 16, 2023
0
76
1
Sam baked an equal number of sausage buns and custard buns.
Sam baked an equal number of sausage buns and custard buns. During the day, 68 sausage buns were sold. Sam also baked another 27 custard buns to meet a last-minute order. At the end of the day, Sam had baked 6 times as many custard buns as the number of
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Guest
Mar 16, 2023
0
82
5
+1124
Sigma
Hi friends,
Trust you are all doing well...please, i really have only this last question....I have tried several things...but just do not get it...
Prove that
If I evaluate the left hand
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juriemagic
Mar 16, 2023
0
65
2
What two numbers add to give − 9 −9 and multiply to give 18 18 ?
What two numbers add to give − 9 −9 and multiply to give 18 18 ? \\What two numbers add to give − 9 −9 and multiply to give 18 18 ?
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Guest
Mar 16, 2023
0
80
3
The radius of a circle is 9 inches. What is the area of a sector bounded by a 180 arc?
The radius of a circle is 9 inches. What is the area of a sector bounded by a 180° arc?
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Guest
Mar 16, 2023
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50
0
Math Problem help pls
A carousel has three rings of wooden horses fixed to a circular platform, which rotates anticlockwise around a central pole. The inner ring of horses is 1.5 metres from the pole and the middle ring of horses is 2.4 metres from the pole. (Distances are between
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Guest
Mar 16, 2023
0
74
1
Math
Consider two circular swimming pools. Pool A has a radius of 12 feet, and Pool B has a diameter of 7.5 meters. Complete the description for which pool has a greater circumference. Round to the nearest hundredth for each circumference. 1 foot ≈ 0.305
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Guest
Mar 16, 2023
-1
81
2
DUE SOON PLZ HELP THANK YOU (in a few hours)
We are looking to factor 23x^2 + kx-5. Some values of k allow us to factor it as a product of linear binomials with integer coefficients. What are all such values of k?
pls dont just give me the answer, as i am trying to learn
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Guest
Mar 16, 2023
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