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All Questions
+0
230619 Questions
-1
828
2
Help...
Suppose that . For example, . For how many distinct integers n does have exactly three distinct elements?
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Guest
Jan 18, 2020
0
2
1280
1
help
Two candles of equal length are lit at the same time. One candle takes 6 hours to burn out, and the other takes 9 hours to burn out. After how much time will the slower burning candle be exactly twice as long as the faster burning one?
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Guest
Jan 18, 2020
0
619
2
I really need help...
1. How many pairs of vertical angles are formed by five distinct lines that have a common point of intersection?
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Multiple questions deleted - we are not here to do all your homework.
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Guest
Jan 18, 2020
+1
721
1
+5
Limit with negative square roots
I'm having some trouble rationalizing and getting the answer from this limit
If rationalizing is the way to go, I've managed to get to (if even that's correct)
I've not figured out a way yet to get 1 as the
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aproximat3
Jan 18, 2020
0
457
1
help
A neighborhood development that is 4 acres is to be divided into 2/3 acre lots. How many lots can be created?
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Guest
Jan 18, 2020
0
767
1
help
What point do we get when we rotate around the point by counterclockwise?
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Guest
Jan 18, 2020
0
698
1
help
Adaline is designing a garden in the shape of a 45º-45º-90º triangle, with an area of 32 ft2. To the nearest foot, how much fencing will she need to enclose the garden?
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Guest
Jan 18, 2020
0
1121
2
please help
Jon is hitting baseballs. When he tosses the ball into the air, his hand is 5 feet above the ground. He hits the ball when it falls back to a height of 4 feet. The height of the ball is given by h = - 16x^2 + 6t + 5 where in seconds How much time will pass
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Guest
Jan 18, 2020
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303
0
This one calculus question is confusing me
Consider the family of functions f(x)=x^4-ax^2. Show that f has a local maximum if and only if f has 3 distinct zeros.
I tried using the quadratic formula where sqrt(b^2-4ac)>0 but that didnt really work so this is confusing me.
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Guest
Jan 18, 2020
0
433
1
one question
https://prnt.sc/qpmahf
thank you !
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Guest
Jan 18, 2020
0
470
1
help
Lucky Charms cereal uses 1 1/3 cups of wheat pieces for every 1/5 of marshmallow pieces. How many cups of wheat pieces are in the box of Lucky Charms cereal if there is 1 cup of marshmallow pieces inside?
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Guest
Jan 18, 2020
0
540
1
help
Four complex numbers form the vertices of a square in the complex plane. Three of the numbers are -19 + 32i, -5 + 12i, and . What is the fourth number?
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Guest
Jan 18, 2020
0
482
2
Combinations
I run a hiking club with n people, not including myself. Every day, for 365 days, I invite four members in the club to go on a hike with me. What is the smallest positive integer n so that I can avoid having the same group of four members over all
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Guest
Jan 18, 2020
0
1186
1
help
It takes a hose 3 minutes to fill a rectangular aquarium 9 inches long, 13 inches wide, and 14 inches tall. How long will it take the same hose to fill an aquarium measuring 21 inches by 25 inches by 35 inches? how many minutes does it take?
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Guest
Jan 18, 2020
0
719
1
help
A lemonade stand sells 14 gallons of lemonade in three hours. How many gallons can they expect to sell after three, eight hours days?
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Guest
Jan 18, 2020
0
1152
1
please help
A certain triathlon consists of a 2.2 mile swim, a 108 mile bicycle ride, and a 25.4 mile run. At one point, a participant had completed twice as many miles as the number of miles left to complete. How many miles had he completed at that mark?
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Guest
Jan 18, 2020
0
1083
13
Confused.
https://web2.0calc.com/questions/counting-and-probability-question-please-help
I looked at this problem, and I didn't understand what the Stirling Numbers is. This is the question:
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Guest
Jan 18, 2020
0
427
1
help
The sides of two regular octagons are 3 in. And 6 in. respectively. Find the ratio of their perimeters and their areas
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Guest
Jan 18, 2020
0
479
2
help
Let a and b be distinct complex numbers on the unit circle. Find the maximum possible value of .
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Guest
Jan 18, 2020
0
691
3
Help
Find the solutions to
Enter all the solutions, separated by commas.
Omi67
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Guest
Jan 18, 2020
0
494
2
help
Let and . Find the complex number z such that z is a trisection point of the line segment joining a and b and z is closer to a than b.
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Guest
Jan 18, 2020
0
975
1
HELP ME NOW
The arithmetic mean of nine numbers is 54. If two numbers $u$ and $v$ are added to the list, the mean of the eleven-member list becomes 66. What is the mean of $u$ and $v$?
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Guest
Jan 18, 2020
0
390
1
HELP ME
A class of 30 students recently took a test. If 20 students scored 80, 8 students scored 90, and 2 students scored 100, then what was the class average (the mean) on this test?
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Guest
Jan 18, 2020
0
573
1
help
Write a recursive formula and an explicit formula for the following arithmetic sequence
13, 17, 21, 25, 29, ..
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Guest
Jan 18, 2020
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