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229719 Questions
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60
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Polygon
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 18, 2023
0
65
2
Please help
A box of cereal states that there are 96 calories in a 3/4 cup serving. What is the unit rate for calories per cup? How many calories are there in 2 cups of the cereal?
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Guest
Mar 18, 2023
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68
2
Help
Two pairs of identical semicircles have been cut out of a rectangular piece of paper of length 30 cm by 14 cm. Find the area of the remaining piece of paper. (Take = 3.14) [4 pts]
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Guest
Mar 18, 2023
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73
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+12
Roots of Unity
So I have a problem regarding roots of unity.
I have that |z|^n=1 and |z+1|^n=1.
I'm supposed to find the exponential form for the possible values of z.
For the first one, I got with both k and
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GandalftheGrey
Mar 18, 2023
0
72
1
Help would be appreciated!
Suppose TIP and TOP are isosceles triangles. Also suppose that TI=5, PI=7 and PO=11 .
What is the sum of all possible lengths for TO?
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Guest
Mar 18, 2023
Mar 17, 2023
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62
1
percent equations
what is an equation for finding %
x / 100 = part / whole
If your part is let's say 20 and the whole is 40 you need to find the percent right?
x / 100 = 20 / 40
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Guest
Mar 17, 2023
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64
1
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?
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Guest
Mar 17, 2023
0
61
1
sequence
Help how to do this
Cai writes down the list of positive integers, excluding squares and cubes and all perfect powers. His sequence starts
2, 3, 5, 6, 7, 10, 11, ...
What is the 100th term in Cai's list?
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Guest
Mar 17, 2023
0
61
3
PLEASE HELP QUICK :D
In this problem, we are constructing 12-letter words with four X’s, four Y’s, and four Z’s.
(a)How many such words have no X’s in the first 4 letters?
Please explain how you got the answers I am curious to know
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Guest
Mar 17, 2023
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59
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Algebra
Need help with these
Select all the correct statements. (For this problem, we assume that an exponential function is of the form ka^x where a > 0)
(A) The following function is exponential: y = 2^x
(B)
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Guest
Mar 17, 2023
0
70
2
Algebra
Factor (ab + ac + bc)^3 - a^3*b^3.
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Guest
Mar 17, 2023
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72
1
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 17, 2023
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68
1
Counting
Find the number of six-digit numbers, where the sum of the digits is divisible by 8.
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Guest
Mar 17, 2023
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64
0
Algebra
Let a, b, and c be nonnegative real numbers. Prove that for all x >= 0,
(x + abc)^3 >= abc(x + a)(x + b)(x + c) >= (x + a + b + c)^3.
Guest
Mar 17, 2023
0
64
0
Algebra
Let r be a root of x^3 - 2x + 5 = x^3 - x^2 + 9. Show that none of r, r^2, or r^3 is irrational.
Guest
Mar 17, 2023
0
62
2
anser
what is 2(-8x-3)+18x
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Guest
Mar 17, 2023
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70
1
The snowstorm
At the beginning of a snowstorm, Connor had 11 inches of snow on his lawn. The snow then began to fall at a constant rate of 3 inches per hour. Assuming no snow was melting, how much snow would Connor have on his lawn 5 hours after the snow began to fall?
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Guest
Mar 17, 2023
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