Wednesday

October 7, 2015
Number of results: 1,225

**Math**

Plz help dont know how to do this question. Write number 68 as a product of prime factors. Try to do prime factorazation. start dividing by 2 68 34 2 17 2*2 Can you go any further? Are all these prime? prime factorization of 34 98
*November 7, 2006 by Maya*

**Math(Please check answers)**

Factor completely. If the polynomial cannot be factored say it is prime. 1) 15x^3 + 19x^2 + 6x A) (3x^2 +2)(5x+3) B) x(3x+2)(5x+3) C) x^2(3x+2)(5x+3) D) x(5x+2)(3x+3) E) Prime I chose E) Prime. 2) 2x^2 - 14x - 6x + 42 A) 2(x+7)(x+3) B) (x+7)(2x-6) C) 2(x-7)(x-3) D) (x-7)(x-3) ...
*September 9, 2010 by Hannah*

**Factoring and Prime**

I am still having troulbe with these. Her is another one I am stuck on. I think the prime is getting me. Factor completely or state that it is prime x^2 + 9xy + 16y^2 The factors of 16 are: 16 x 1. 8 x 2. 4 x 4. None of these add together to give 9 so it can't be factored as ...
*June 13, 2006 by Bekki*

**Math**

Which of the following is a prime #? a.2 b.19 c.37 d.51 e.67 I choose 2. But the book answer is 51. The book says:( 2,19,37, and 67 are prime #'s) 3x17=51, so it is not prime. I forgot what prime #'s mean that's why I choose anything like 2. help me. A prime number is a number...
*August 9, 2007 by Mack*

**Math**

What is a unit rate? what is the prime factorazation for 945? idk how to do this 10= 15= GCF= i need help with my prime factorization homework what is a prime factorazation i meed held on my homework how do u determine if the numbers are prime or composite
*December 12, 2006 by Lindsey*

**College Math Probability**

Let 1 <= k <= p−1, where p is prime. Show that p choose k is a multiple of p. What if p is not prime? I think here when we expand p choose k and then input few prime numbers then we always get a multiple of p . And same with when p is not prime.
*October 7, 2012 by Genie_math*

**PROBLEM SOLVING IN MATHEMATICS**

there are two prime numbers between 100 and 199 such that the ten digits is a prime number, the ones digit is a prime number and the tens and ones digits taken together are a 2 digit prime number. find the sum of these 2 prime number.
*October 6, 2011 by alya*

**math**

What is the greatest prime to consider to test wheather 1579 is prime. What is the greastest prime?
*November 18, 2014 by Michellle*

**math**

The Twin Prime Conjecture, which has not been proven, argues that there are infinitely many pairs of primes of the form n and n+2. Such a pair is called a prime pair. Some examples of prime pairs are 5 and 7, 17 and 19, and 29 and 31. How many prime pairs have both members ...
*February 18, 2012 by Miep*

**math**

The Florida Lottery is made up of the numbers 1-49. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 1-49: 2.What is the probability of a prime number being picked randomly from the numbers 1-49? 3.Is the probability ...
*January 17, 2010 by Anonymous*

**math**

The Florida Lottery is made up of the numbers 1-49. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 1-49: 2.What is the probability of a prime number being picked randomly from the numbers 1-49? 3.Is the probability ...
*January 17, 2010 by Anonymous*

**math**

is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the reals, f(0)=0, F prime...
*November 14, 2009 by sammy*

**math**

is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the reals, f(0)=0, F prime...
*November 15, 2009 by sammy*

**Pre calc**

Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding the equation for x^2 +...
*May 5, 2013 by Rebekah*

**Math Prime Numbers**

Grade 7 question: I am a two-digit prime number I am one less than a multiple of 10 If you add 30 to me you get another prime number Who am I _________?
*September 8, 2008 by Elena*

**MATH HELP**

What is the greatest prime to consider weather to test 1881 is prime. the greates prime to consider is?
*November 19, 2014 by BECKY!*

**maths**

4x+3y=21 What is your question? You have simply stated the equation of a straight line. what is a prime factorazation?> expressing a number in terms of its Prime factors eg. 126 = 2*3*3*7 all the factors are prime numbers How does this relate to the first problem you posted?
*March 23, 2007 by abi*

**science**

how is the equator similar to the prime meridian A. both the prime meridian and equator are lines that divide earth into norther and southern hemispheres B. both the prime meridian and equator are imaginary base lines from which locations of earth can be measured D. both the ...
*May 14, 2014 by mary*

**MATH!**

The sum of two prime numbers is the prime number 89,563. Find the smaller of the two addends. I attempted the problem but I'm not sure if it is right. 89,561 is a prime number and so is 2. So is the answer 2?
*May 6, 2011 by Lee*

**math**

The vertices of a rectangle are R(-5,-5), S(-1,-5), T(-1,1),and U(-5,1). After translation, R prime is the point (0,-13). Find the translation vector and coordinates of U prime. I got (5,-8) as my tanslatipn vector and (0,-7) as my U prime. Is this right?
*November 24, 2007 by keisha*

**Math (Complex Numbers)**

Let N be the sum of all prime powers that can be written as 4^n+n^4 for some positive integer n. What are the last 3 digits of N? Details and assumptions: A prime power is a number of the form pk, where p is a prime and k is a positive integer. Examples: 3,9,16.
*May 9, 2013 by Mahler*

**IB HL Math**

I need to that if there is better way to prove the following: I am trying to prove that x r = k and k is a multiple of x only when x is prime. I said that if x is non-prime, then: Let a = 6 Let r = 4 6! (6 – 4)! 4! = 3(2) x 5 x 4! (2!) 4! = 15 It is not divisible by 6 My ...
*March 14, 2009 by Asad*

**math**

the florida lottery is made up of the number 1-49. my mother observed that the winning numbers many times are prim numbers. a. list the prime numbers from 1-49 b. what is the probability of a prime number being picked randomly from the numbers 1-49? c. is the probability of ...
*February 1, 2010 by ssmomo*

**Math**

The number p is the product of three different positive prime numbers greater than 2.If the sum of these three prime number is also prime, what is the smallest possible value for p? Won't the 3 number be 3-5-11? Thanks
*May 21, 2014 by Shadow*

**math**

The vertices of a rectangle are R(-5,-5), S(-1,-5), T(-1,1), and U(-5,1). After translation, R prime is the point (0,-13). Find the translation vector and coordinates of U prime. I got (5,-8) as my translation vector and (0,-7) as U prime. Is this right?
*November 23, 2007 by keisha*

**mathematics**

Find the smallest prime number N such that the following is true: The largest prime factor of N−1 is A; The largest prime factor of A−1 is B; The largest prime factor of B−1 is 7.
*April 21, 2013 by Sambaran G.*

**Math**

Find the smallest prime number N such that the following is true: The largest prime factor of N−1 is A; The largest prime factor of A−1 is B; The largest prime factor of B−1 is 7.
*April 25, 2013 by Zeneth*

**math**

The number 5 is A) prime B) composite C) neither prime nor composite D) both prime and composite
*August 27, 2014 by pietro*

**Math**

What are 2 prime numbers between 100-199 such that the tens digit is a prime number, the ones digit is a prime number, and the tens and ones digit taken together are 2 digit prime number.
*April 23, 2013 by Anonymous*

**math**

What methods can you use to find prime numbers? How are prime numbers used in mathematics? How can you use prime factorization to find the GCF and LCM? Provide an example
*June 18, 2009 by chandice*

**Math**

Let n = c x p, where p is a prime number, and c is a composite number less than p. The number c has three unique prime factors. How many unique prime factor does n^2 have?
*July 2, 2014 by Anne*

**Algebra Please check answers**

Could you please check these answers thanks. Directions: Factor each polynomial. If the polynomial cannot be factored, write prime. 1. a^2-16b Answer: (a-16)(a+16) 2. m^2+8m+16 Answer: (m+8)^2 3. 3a^2b+6ab+9ab^2 Answer: Prime 4. 2r^2+3r+1 Answer: Prime 5. z3+6z^2+9z Answer: Prime
*April 5, 2009 by Rae Rae*

**Math**

All numbers in our real number system are the product of prime numbers. Complete the following steps for this discussion: 1. List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15 years of age or ...
*March 28, 2013 by Tammy*

**maths**

my number is less than 100 one more than a multiple of 3 one of its digits is prime if you reverse its digits you get a prime it has exactly four factors the sum of digits is prime if you miltiply it by 5 it is greater than 100
*February 19, 2014 by ashley*

**math/prime factorization**

what is the prime factorazation for these numbers 36,180,525,165
*September 16, 2008 by BLANCA*

**Math**

Are these prime number correct all the way up to 50 (1,3,5,7,11,13,17,22,23,25,27,31,33,35,37,41,43,45,47 ) What kind of tens are prime
*September 7, 2011 by JJ*

**Math**

What is the greatest prime you must consider to test whether 7356 is prime?
*July 26, 2015 by Kim*

**math**

What is the greatest prime number you must consider to test whether 5141 is prime?
*July 20, 2009 by timothy*

**alegbra**

factoring completely, state that the polynomials is prime. x^-16 (x+8)(x-8) not prime. x^-8x+12 x(8x+12) (4x+6) Check these problem me please
*May 14, 2010 by Ashley*

**math**

list all prime under 20. then find the GCF for 64 and 80 use prime factorization.
*August 15, 2012 by kyle*

**math**

WHAT IS THE PRIME FACTORIZATION OF 45? and what is the sum of the only two prime numbers that differ by one ? Thank you
*July 8, 2013 by sam *

**Math 156**

What is the greatest prime you must consider to test whether 7356 is prime? Thanks for the help.
*July 26, 2015 by Bella*

**math**

Let’s agree to say that a positive integer is prime-like if it is not divisible by 2, 3, or 5. How many prime-like positive integers are there less than 100? less than 1000? A positive integer is very prime-like if it is not divisible by any prime less than 15. How many very ...
*April 1, 2010 by chicken*

**MATH**

Let’s agree to say that a positive integer is prime-like if it is not divisible by 2, 3, or 5. How many prime-like positive integers are there less than 100? less than 1000? A positive integer is very prime-like if it is not divisible by any prime less than 15. How many very ...
*April 2, 2010 by David*

**Calculus**

What is the largest two digit prime number whose digits are both prime numbers?
*January 26, 2008 by Ashley*

**Math**

Find all the two digit prime numbers neither of whose digits are prime.
*March 14, 2011 by Diana*

**Math**

Prime Factoization of 504. Prime Factorization of 1080.
*February 19, 2008 by John*

**Math (Proof)**

Prove that if ab = ac (mod n) and a is relatively prime to n, then b = c (mod n). Proof: a and n are relatively prime and from ab = ac(mod n), we have n|(ab-ac), so n|a(b-c). Since (a,n)=1 (relatively prime), we get n(b-c). hence b=c(mod n). But what if a and n are not ...
*February 14, 2013 by Michael*

**math please**

what exactly is a prime factor would x-5 x+5 and x2+25 all be prime factors of x4-625? Yes, I believe those would be the prime factors. x^4 - 625 can be factored into (x^2 -25)(x^2 + 25) and once again into (x-5)(x+5)(x^2 + 25) That is what you have done. Any additional ...
*November 30, 2006 by anonymous*

**Algebra**

When factoring an equation, how do I know if the result is prime? For example, I have a problem x^2 - 2x + 4 and I think it is prime because I can't solve it. Am I right?
*April 1, 2013 by Mary*

**Algebra**

Explain why x^2 +5x + 8 is prime(not factorable) How do you know? Give 2 examples of a prime polynomial(can't be both binomials) Give 2 examples of polynomials that are not prime(they can't be both binomials),factor them,explain what you did to factor them. How would you ...
*July 6, 2010 by Jaz*

**Algebra**

Explain why x^2 + 5x + 8 is prime (not factorable). How do you know? Give 2 examples of a prime polynomial (they cannot both be binomials). Give 2 examples of polynomials that are NOT prime (they cannot both be binomials), factor them, and explain what you did to factor them. ...
*August 22, 2010 by John*

**Calculus**

Let me try to ask this question a different way: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by implicit differentiation. I can differentiate it to 8x+2+y+xy(prime)=0 I don't know what to do with the y(2)=-4 after this point.
*February 25, 2010 by Elisabeth*

**Math**

Greta said that the product of two prime numbers must also be a prime number. Joan disagreed. Who is correct?
*December 6, 2011 by KC*

**math**

Find all the two digit prime numbers neither of whose digits are prime. Someone helped me yesterday but I do not understand.
*March 15, 2011 by Diana*

**geography**

Okay, I have my Mom looking at this with me. From the information on the map it seems the answer is the Prime Meridian at 0 degrees longitude and its twin line of longitude opposite to the Prime Meridian at 80 degrees longitude. However, I told my Mom it is the Prime Meridian ...
*October 30, 2011 by Reed*

**Math**

A positive integer n is defined as a "prime interlude" if n-1 and n+1 are both prime numbers. Which of the following is not a "prime interlude?" a.4 b.18 c.30 d.72 e.90 ( First of all; What is a "prime interlude??") I don't understand the question and don't know which answer ...
*August 9, 2007 by Mack*

**Math**

) Form a conjunction from the following two statements and determine if the conjunction is true or false. Explain. Two is an even number. Two is a prime number. A) Two is an even number or two is a prime number.; False B) Two is an even number and two is a prime number.; True ...
*October 20, 2009 by Anonymous*

**calculus**

when finding the tangent line to the curve using T(t)= r(t)prime/ /r(t)prime/ and the eq. of the curve being r(t)= (e^t, te^t, te^(t^2)), at point (1,0,0) why does t=o. How is the parameter for t found or calculated?
*December 13, 2008 by maria*

**math algebra**

Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990 Im stuck
*July 29, 2015 by Ben*

**Math**

How many prime numbers are between 0-50? Prime Number= Only has factors of 1 and it's self. For example. 3, it has 3 and one for the factors.
*January 26, 2009 by Liley*

**math**

I have the same question as Sally: What is the prime factorization of 225? Or, just how do you find prime factorization??? Thanks.
*June 16, 2009 by Tyler*

**arithmetic**

USING PRIME FRACTORIZATION WHAT IS THE GCF FOR 45,100 USING A FACTOR TREE AND COMMON PRIME FACTORS
*November 10, 2009 by Anonymous*

**math**

Which numbers between 40 and 49 have 2 and 3 in their prime factorization?Use exponents to write the prime factorization of each number.
*August 15, 2013 by Anonymous*

**math**

Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990
*July 29, 2015 by ben*

**math**

Which number between 29 and 39 has three different prime factors?What is the prime factorization of this number?
*August 14, 2013 by Anonymous*

**math**

the difference between two prime numbers is 1985 the larger of these prime numbers is what
*August 8, 2015 by Anonymous*

**MATH**

TWO INTEGERS ARE DEFINED AS "PARTNERS" IF BOTH OF THEIR PRIME FACTORIZATIONS CONTAIN ALL THE SAME PRIME FACTORS. FOR EXAMPLE, 15 AND 45 ARE PARTNERS SINCE BOTH ARE DIVISIBLE BY THE SAME SET OF PRIME NUMBERS 3 AND 5. HOW MANY POSITIVE INTEGERS GREATER THAN 50 AND LESS THAN 100 ...
*September 11, 2012 by DEANDRA*

**science**

1. How is the equator similar to the prime meridian? (1 point) Both the equator and prime meridian are lines that divide Earth into the Northern and Southern hemispheres. Both the equator and the prime meridian are imaginary base lines from which locations of Earth can be ...
*May 15, 2014 by TTR+S<3*

**math**

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2^2 3^2 (that is 2 squared and 3 squared)Then ...
*October 15, 2010 by m*

**Calculus**

I saw this question asked, but I didn't understand the answer format. My prof doesn't use dx and dy after he has differentated the problem. He just uses (for example) 8x+2+y+xy(prime) The question is this: 4x^2+2x+xy=12 and y(2)=-4 find y(prime)(2) by implicit differentiation.
*February 24, 2010 by Elisabeth*

**Math**

If a composite number has the first five prime numbers as factors, what is the smallest number it could be? Write that number's prime factorization.
*September 23, 2009 by Sue*

**math**

the sum of the digits of a two digit prime number is substracted from the number. prove that the difference cannot be a prime number.
*April 12, 2012 by mima*

**math**

I'm a bit confused on the whole lesson on finding coordinates on a graph. With prime or double Prime, and with the shapes. if some can explain it to me in a easier way, that would be cool. Thanks! (sorry if I didn't explain my problem well enough)
*September 11, 2014 by dave*

**math prime factorization**

write the prime factorization of 15 using exponents.
*September 28, 2009 by NINA*

**Prime Factorization**

What is the prime factorization of 1,521? Please show work. Thanks!!
*December 6, 2010 by Thanks to all Jiskha Teachers*

**math**

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3 Then increase each ...
*June 22, 2009 by thomas*

**math**

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3 Then increase each ...
*June 22, 2009 by thomas*

**MATH 101**

Factor completely. Be sure to factor out the greatest common factor first if it is other than 1. (If the polynomial is prime, enter PRIME.) 56a^2+39ab-27b^2
*October 13, 2014 by Haylee*

**Math**

I am a prime number between 40 and 50. If you add one to me the sum of the prime factors of that composite number is 11. What number a I.
*September 24, 2007 by Danielle*

**math**

I am a prime number between 40 and 50. If you add one to me, the sum of the prime factors of that composite number is 11. What number am I?
*September 26, 2007 by veronique*

**Math**

I am a prime number between 40 and 50. If you add one to me, the sum of the prime factors of that composite number is 11. What number am I?
*November 30, 2008 by Kris*

**math**

number is greater than 50 and less than 100. you can make exactly 5 different rectangles with a mystery numbers of tiles. its prime factorization consists of only one prime number. whats my number
*January 24, 2011 by Anonymous*

**math**

How to you do the prime factorisation of 350 using exponets? Just break it down into smaller and smaller factors until are are prime. 350 = 50 * 7 = 10 * 5 * 7 = 5*2*5*7 = (5^2)*2*7 1000
*January 16, 2007 by Lesley*

**Math**

I have a ? that I am kind of stuck on. It says give an infinite list of natural numbers that are not prime. I know half of the numbers are prime and half are not, but I'm not sure how to answer it. Thanks.
*February 15, 2011 by Jon*

**Math I need help Ms. Sue please answer!**

6th Grade Math: Write 144 as a product of prime factors. Then write the prime factorization using exponents.
*September 25, 2012 by Angelina*

**math**

The difference between two prime numbers is 1985. The larger of these two prime numbers is A. 2431 B. 2002 C. 1987 D. 1986
*August 8, 2014 by Kitty*

**math**

Completely factor the expression 2a3 − 128. A. 2(a − 4)3 B. 2(a − 4)(a2 + 4a + 16) C. 2(a3 − 64) D. Prime Completely factor the expression 7(x − y) − z(x − y). A. Prime B. (x − y)(7 − z) C. (x − y)(7 + z) D. (x −...
*May 14, 2015 by realiesna*

**Algebra**

Is there any prime number whose root is an integer? I meant to say Square Root Nevermind I figured it out. Good work. If a prime number by definition has no factors, ...
*June 26, 2007 by Jess*

**nonlinear algebra**

Use prime factorization to simplify the following square root leave as exact answer. How do you find the prime factors of this problem? 112 square root
*March 15, 2013 by Kylie*

**discrete math**

which positive integers less than 12 are relatively prime to 13 Since 13 has no factors, then all integers 2, 3, 4, 5, 6....11 are relatively prime to 13
*November 6, 2006 by thisha*

**MATH**

THE VALUE 2 TO THE 8TH POWER - 1 IS DIVISIBLE BY THREE PRIME NUMBERS. WHAT IS THE SUM OF THE THREE PRIME NUMBERS?
*September 11, 2012 by CASSIE*

**heeeeeeelp math**

P is a point outside of circle Γ. The tangent from P to Γ touches at A. A line from P intersects Γ at B and C such that ∠ACP=120 ∘. If AC=16 and AP=19, then the radius of Γ can be written as a root b/c where a and c are co prime and c is not ...
*June 7, 2013 by clavin*

**math**

how would you calculate teh largest prime number given a number x so for example say someone inputs 8 , the largest prime number is 7.
*October 23, 2014 by sam*

**maths**

Find the sum of the smallest 2 digit prime number and the largest 2 digit prime number.
*March 31, 2012 by ssssss*

**math**

which of these statements about prime and composite numbers is true? F)all prime numbers are odd. G)all prime numbers have three factors. H)all composite numbers are divisible by two. J)all composite numbers have more then two factors i thinks it (J) but im not sure
*March 25, 2010 by george*

**math**

what's the prime factorization of 293? what's the prime factorization of 525? and factorization of 216?
*September 19, 2008 by brandy*

**math**

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number
*November 14, 2012 by tom*

**math**

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number
*November 14, 2012 by tom*

**Geography**

Is this correct? What line of longitude forms the other half of the prime meridian? When joined with the Prime Meridian the 180 degree of longitude forms a complete circle
*September 14, 2012 by Sean*