4,511 Answered Questions for the topic prealgebra

Prealgebra Math Algebra

05/04/21

Question help :

1.when it comes to solving counting problems, how would you know when to use (43powers) (factorials !), or nPr(permutations) ?
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05/04/21

permutation Question help

1.question:if no digit can be repeated, how many numbers can be made fromthe digits 2, 3,4,&5 ?(would it be 3,628,800?)
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Prealgebra Math Precalculus Algebra

05/04/21

permutation question help

Question:what are the different number of ways would a cameramanarrange/pose a row of 6 peoplewithout the tallest person standing next to the shortest?would it be 240? (5x2=10, there are 4!, so... more
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Prealgebra Math Precalculus Algebra

05/04/21

Permutations Question Help
from a deck of cards, 5 cards are chosen. what is the likelihood of choosing 5 face cards
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05/04/21

permutations help!
1.how many 4digit numbers can be formed witha) repetition and b) without it
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Prealgebra Math Algebra 1 Algebra 2

05/04/21

Please Help! Solve the following

Solve for n, n E (supposed to be cursive e) Wa) (n+1)! / n! = 9b) n! / (n-2)! = 20c) 3(n+1)! / (n-1)! = 126d) 2n! / (n-3)! = 84nSteps and explanation would be very helpful!
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Prealgebra Math Algebra 1 Algebra

05/04/21

Question: The six members of the student council...
1.The six members of the student councilexecutive are lined up for a yearbook photo.c) In how many ways could this be done ifthe president and vice president must sittogether in the middle of the... more
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Prealgebra Math Algebra 1 Algebra

05/04/21

Permutation Problem
a) How many 10-digit numbers are therewith no digits repeated?b) How many 7-digit numbers are therewith no digits repeated?
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Prealgebra Math Algebra 1 Algebra

05/04/21

Permutations Help
A salesperson needs to visit 15different offices during the week.c) In how many ways could she visit threedifferent offices each day from Mondayto Friday?I thought of it as 1st day 15x14x13, 2nd... more
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Prealgebra Math Algebra 1 Algebra

05/04/21

Write in factorial form.
d) 8x7x6x5Please show all steps
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Prealgebra Math Algebra 1 Algebra 2

05/04/21

Permutations Question Help!
1.How many numbers greater than 300,000 are there using only the digits 1,1,1,2,2,3?How would do this question, please explain with additional steps.
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Prealgebra Math Algebra 1 Algebra 2

05/04/21

Permutations Problem
Daisy is shelving books in a display in the school library.She has four different books with three copies of each. In how many ways can he arrange the books on the shelf for display? Please Explain... more
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05/04/21

Permutations Question
a) How many permutations are there of the letters of the word BASKETBALL? I know the answer is 453,600. (Needed help for b,c, and d) b) How may of the arrangements begin with K? ... more
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Prealgebra Math Algebra 1 Algebra

05/03/21

Factorial Question help
1.a) 20x19! For this one, would it be since (5x4=20) it would be 5x4x19x18x17....1? b) 90x9!Please help I don't understand how to do these. Give full explanation if you can. thanks.
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Prealgebra Math Algebra 1 Algebra 2

05/03/21

Factorial Questions Help
Calculate each factorial: a) 20x9! I’m still confused on how to put in fraction form, I did 5x4 which = 20 and did 5x4x3x2x1 = 5! and it was wrong, Does it matter what numbers your multiplying to... more
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Prealgebra Math Algebra 1 Algebra 2

05/03/21

Need help GOOD EXPLANATION NEEDED I don't understand

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Prealgebra Math

05/03/21

A trader sold 40 bags of flour in 50-grams and 300-grams bags. Totally he sold 4.5 kg of flour. How many of each bag did the trader sell?
Variables needed to solve.
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Prealgebra Math

05/03/21

Kenneth got a test of 20 questions. For each correct answer he got 5 points and for each wrong he lost 2 points. Totally Kenneth's scored 72. How many right answers did he give?
We should be using variables for this.
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05/03/21

Math help Needed!
my formula i used to solve this question if you notice i did somethin incorrectly PLEASE correct me. thank as always for helping me formula :A= 19X12/2 = 114 CORRECT? t
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Prealgebra Math Algebra Mathematics

05/03/21

Factorial Problems
Please explain + show steps!! (mainly confused about a,b,c)a) (n+2)(n+1)!b) (n+1)! / (n-1)!c) n(n-1)!d) 2 x 5! / 3! 2! (The 2 is not with the 5!, its the multiplying the whole equation)
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Prealgebra Math Algebra 1 Algebra 2

05/03/21

Calculate each Factorial:
a) 30x4! The answer is 720 when you plug it in the calculator, but how can make it to be 6!, 6! = 720, if that makes sense.b) 7 / 2! 5! + 7! / 4! 3!I did, 7x6x4x3 = 504, 7x6x5 / 3x2x1 = 84, 84 +... more
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Prealgebra Math Algebra 1 Algebra 2

05/03/21

Permutations Problem

How many ways are there to seat 5 adults and 6 children in a row of chairs so that no kids sit together?Explain please with steps for a better understanding!
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05/03/21

Permutations Question Help
How many ways could 10 questions on a test be arranged if the easiest and hardest one are side-by-side? Please explain this scenario and how to do it with steps!
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05/03/21

Calculate each factorial:
c) 92! / 88!d) 5x4x3!e) (n+2)(n+1)!f) (n+1)! / (n-1)!For each question, How would you do this please explain and show steps
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Prealgebra Math Algebra 1 Algebra

05/03/21

Question; the final score of a soccer game is 6 to 3...
The final score of a soccer game is 6 to 3. How many different scores were possible at half-time? Please explain. Is it basically saying that the first team could have had any score between 0 and 6... more
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