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230445 Questions
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200
5
How To Solve this Problem Algebraically?
1. sqrt(x-3) + sqrt(5) = sqrt(2) + sqrt(x+2)
2. Simplify: 9th root of (121060821x^520b^47228) EXPLAIN your thought procedure/thought process
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Guest
Dec 3, 2022
0
117
1
geometry
Triangle ABC is a right triangle with angle BAC= 90 degrees and angle B > angle . Suppose AP is an altitude of the triangle, AQ is an angle bisector of the triangle, and AR is a median of the triangle, and angle PAQ = 18 degrees. If P
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Guest
Dec 3, 2022
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128
0
是否存在m的值会使关于y的方程m(k- 3)y=2+(3a- m)y无解,若存在请求m的值,若不存在请说明理由.
是否存在m的值会使关于y的方程m(k- 3)y=2+(3a- m)y无解,若存在请求m的值,若不存在请说明理由.
The presence or absence of a value of m will make the equation m(k- 3)y=2+(3a- m)y unsolvable for y, and if there is a value of request m, please explain the reason if it does not exist.
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Guest
Dec 3, 2022
0
109
1
help math
For nonnnegative integers a and b, where a >= 2 and b >= 2, simplify
binom{a + b}{2} + binom{2a + b}{2} + binom{a + 2b}{2} - binom{a - b}{2}
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Guest
Dec 3, 2022
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100
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Algebra question
Consider the two expressions (6x^3 + 9x^2 + 4x + 7 - 17x^2 - 8x + 8)/(2x + 3 - 7x - 11) and 4x^2 - 7 + 1/(2x + 3 - 7x - 11)
a) Show that the two expressions represent equal numbers when x = 10
b) Explain why these two expressions do not represent
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Guest
Dec 3, 2022
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121
1
help plz
Fill in the blanks to make the equation true
\binom{n}{k} = \binom{n - 2}{k} + \binom{n - 2}{k - 1} + \binom{n - 1}{k} + \binom{n - 1}{k - 1} + \binom{n}{k - 1} + \binom{n}{k + 1}
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Guest
Dec 3, 2022
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129
2
acceleration question, im stuck
An object uniformly accelerates while traveling a distance of 45 meters. If the object's velocity changes from 3.4 m/s to 5.7m/s, how long does it take the object to travel the 45 meters distance?
It's not
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Guest
Dec 3, 2022
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186
1
algebra
Simplify binom{100}{50}/binom{200}{51}*binom{100}{51}/binom{200}{50}
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Guest
Dec 3, 2022
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138
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+64
Pentagons (help needed)
The problem is in the image
Chandalier
Dec 3, 2022
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116
1
Function
For a certain function f(n), the identity
(2n)/n - (2n)/(n + 1) = f(n) (2n)/n
for all nonnegative integers n. Find f(n).
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Guest
Dec 3, 2022
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115
1
Pascal's triangle
The entries in a certain row of Pascal's triangle are
1, n, ..., n, 1
The average of the entries in this row is 2. Find n.
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Guest
Dec 3, 2022
0
115
1
paths
Find the number of paths from P to Q, where each step is to the right or up.
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Guest
Dec 3, 2022
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93
0
help algebra
For a real number r, let s(r) denote the set of real numbers that can be expressed in the form
a1 r + a2 r^2 + a3 r^3 + ...
with an infinite number of terms, where ai in {0,1}
(a) Show that 1/2 an element in S(1/4)
(b) Show that 1/5
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Guest
Dec 3, 2022
Dec 2, 2022
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106
1
Fractions
Levans writes a positive fraction in which the numerator and denominator are integers, and the numerator is 1 greater than the denominator. He then writes several more fractions. To make each new fraction, he increases both the numerator and the denominator
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Guest
Dec 2, 2022
0
117
1
Algebra problem
Arrange the following numbers in increasing order (smallest first, biggest last):
A = 2*1/2*4*1/6
B = 12*128
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Guest
Dec 2, 2022
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129
1
geometry
In the diagram, four squares of side length $2$ are placed in the corners of a square of side length $6$. Each of the points $W$, $X$, $Y$, and $Z$ is a vertex of one of the small squares. Square $ABCD$ can be constructed with sides passing through $W$,
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Guest
Dec 2, 2022
-1
116
2
help 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
Dec 2, 2022
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127
1
need help
The grid below is made up of line segments, like the line segment in red.
There are a number of paths that go from A to B in the grid, where every step goes to the right or up. If we choose a line segment at random, then what is the expected number of
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Guest
Dec 2, 2022
-1
128
1
If 1 = 0,852 and X = 0,148. What is X?
If 1 = 0,852 and X = 0,148. What is X?
I have been trying to answer this question for a project I'm currently working on.
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Guest
Dec 2, 2022
0
117
2
Algebra
Let a and b be real numbers such that a + b = 4 and a^4 + b^4 = 16.
(a) Find all possible values of ab
(b) Find all possible values of a + b
(c) Find all possible values of a and b
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Guest
Dec 2, 2022
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112
1
help counting
Six children are each offered a single scoop of any of 3 flavors of ice cream from the Combinatorial Creamery. In how many ways can each child choose a flavor for their scoop of ice cream so that each flavor of ice cream is selected by at least two children?
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Guest
Dec 2, 2022
0
121
1
Algebra
A factory manufactures two types of gadgets: regular and premium.
Each gadget requires two stages, assembly, and finishing, and there are at most 120 hours available for each operation (that is, 120 hours for assembly, and 120 hours
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Guest
Dec 2, 2022
0
115
1
help probability
Valeria has three coins, each of which has a probability of 1/2 of coming up heads. On her first turn, she flips all three coins. If all three come up heads, then she stops. Otherwise, for her second turn, she flips any coins that came up tails.
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Guest
Dec 2, 2022
0
111
1
algebra
Fill in the blank to make the equation true.
13*5*13*___*3 = 13*17
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Guest
Dec 2, 2022
0
120
1
help polygon
Let P be a regular nonagon with side length 2, and let S be the set of points that are within a distance of 1 from S. (That is, a point X is in S if there exists a point Y in P such that XY <= 1.) What is the perimeter of P?
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Guest
Dec 2, 2022
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