Free pre-calculus mathematics homework help from qualified mentors. Math courses prior to calculus homework. Please use the template when requesting help and show your work.
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Show that ## a^{12}\equiv 1\pmod {35} ##.
- Math100
- · Replies 1 ·
How do I manually stack photos for an equal average using given opacity levels?
- LightningInAJar
- · Replies 46 ·
Verify that ## 17 ## divides ## 11^{104}+1 ##
- Math100
- · Replies 5 ·
Can we use criss-cross approach with complex number equations?
- vcsharp2003
- · Replies 9 ·
Understanding cot2(theta) = A-C / B
- Terrell
- · Replies 8 ·
Obtain the two incongruent solutions modulo 210 of the system
- Math100
- · Replies 7 ·
Find the solutions of ## 7x+3y\equiv 6\pmod {11} ##.
- Math100
- · Replies 2 ·
Can this system of inequalities be solved for x?
- annamal
- · Replies 5 ·
Find the solutions of the following system of congruences
- Math100
- · Replies 2 ·
Obtain the eight incongruent solutions of the linear congruence
- Math100
- · Replies 2 ·
Find the solutions of the system of congruences
- Math100
- · Replies 1 ·
How to find all solutions of ## 3x-7y\equiv 11\pmod {13} ##?
- Math100
- · Replies 6 ·
Is 2i + j + 3k the Normal Vector of Plane CDPQ?
- songoku
- · Replies 5 ·
Find an integer having the remainders ## 2, 3, 4, 5 ##.
- Math100
- · Replies 2 ·
Finding Integer with Chinese Remainder Theorem
- Math100
- · Replies 3 ·
Prove that ## x\equiv 1\pmod {2n} ##
- Math100
- · Replies 2 ·
Prove that the congruences admit a simultaneous solution
- Math100
- · Replies 5 ·
Finding triangle side length with only area and one side given
- shirozack
- · Replies 27 ·
What was the least number of coins that could have been stolen?
- Math100
- · Replies 3 ·
Using 5C2 to calculate number of ways to get 2 heads in 5 coin tosses
- Darkmisc
- · Replies 4 ·
Modulo with negative numbers: why is -3 mod 26 equal to 23?
- shivajikobardan
- · Replies 22 ·
Find the smallest number of eggs
- Math100
- · Replies 1 ·
Expected Value of Election Results
- vparam
- · Replies 7 ·
How to obtain three consecutive integers?
- Math100
- · Replies 3 ·
Solve ##x\equiv 5\pmod{11},x\equiv 14\pmod{29},x\equiv 15\pmod{31}##
- Math100
- · Replies 3 ·
Solve ##x\equiv 1\pmod {3},x\equiv 2\pmod {5},x\equiv 3\pmod 7 ##
- Math100
- · Replies 1 ·
Solve the following linear system
- chwala
- · Replies 21 ·
Solve ## 6x\equiv 15\pmod {21} ##.
- Math100
- · Replies 7 ·
Solve ## 25x\equiv 15\pmod {29} ##.
- Math100
- · Replies 1 ·
Show that ## 11\mid R_{n} ## if and only if ## n ## is even
- Math100
- · Replies 3 ·
Determine whether each of the ISBNs below is correct
- Math100
- · Replies 7 ·
Determine the value of the obscured digit
- Math100
- · Replies 1 ·
Check digits for 55382006 and 81372439
- Math100
- · Replies 1 ·
Why Do Some Projects Fail Despite Best Efforts?
- kal-kim
- · Replies 4 ·
Find missing digits x and y in x679y divisible by 72
- Math100
- · Replies 1 ·
Prove that ## 13 ## divides ## 10^{2p}-10^{p}+1 ##
- Math100
- · Replies 1 ·
Finding a solution to the Diophantine equation 6x + 10y + 45z =1
- MidgetDwarf
- · Replies 2 ·
Show that ## 9\mid R_{n} ## if and only if ## 9\mid n ##
- Math100
- · Replies 2 ·
Factor the repunit ## R_{6}=111111 ## into a product of primes
- Math100
- · Replies 3 ·
Proof: Palindromes Divisible by 11
- Math100
- · Replies 1 ·
Prove that ## 7, 11 ##, and ## 13 ## all divide ## N ##
- Math100
- · Replies 6 ·
Verify that ## N-M ## is divisible by ## 9 ##
- Math100
- · Replies 7 ·
Is 1010908899 divisible by 7, 11, and 13?
- Math100
- · Replies 6 ·
Proof That 6 Divides Any Integer N
- Math100
- · Replies 3 ·
Solve the given simultaneous equation
- chwala
- · Replies 32 ·
Minimum Length of Cuts for Unfolding Box Into Flat Sheet?
- Darkmisc
- · Replies 10 ·
If ##x> 1## and ##x^2 <2##, prove ##x < y##, ##y^2<2##
- issacnewton
- · Replies 10 ·
Linearity and non-linearity in addition and multiplication
- Thytanium
- · Replies 15 ·
Supply Equation: Y=mx+c or S=d*Qty+c, Why P Instead of Qty?
- shivajikobardan
- · Replies 7 ·
Can this be solved without trial and error?
- Darkmisc
- · Replies 6 ·
Poisson distribution for misprints with secretaries A and B
- hb2325
- · Replies 1 ·
Show that ## 2^{n} ## divides an integer ## N ##.
- Math100
- · Replies 6 ·
Confidence interval for telephone spending using MegaStat
- mexicnfmle
- · Replies 8 ·
Find the values of ## n\geq 1 ## for which ## 1+2+3+\dotsb +n ##.
- Math100
- · Replies 4 ·
Solving for ##x## for a given inequality
- brotherbobby
- · Replies 3 ·
Prove that there exists a prime with at least ## n ## of its digits.
- Math100
- · Replies 2 ·
Show that ## t_{n+2k}\equiv t_{n}\pmod {k} ##.
- Math100
- · Replies 7 ·
Determine the last three digits of the number ## 7^{999} ##
- Math100
- · Replies 3 ·
No integer whose digits add up to ## 15 ## can be a square or a cube
- Math100
- · Replies 4 ·
Obtain the digits ## x ## and ## y ##
- Math100
- · Replies 3 ·
Solve for ##x## involving modulus
- brotherbobby
- · Replies 10 ·
Finding triangle angles when one side is 46 and the median to that side is 35
- LightningInAJar
- · Replies 11 ·
Find the remainder when ## 4444^{4444} ## is divided by ## 9 ##.
- Math100
- · Replies 3 ·
Show that ## a^{2}-a+7 ## ends in one of the digits ## 3, 7 ,9##
- Math100
- · Replies 6 ·
Testing divisibility of two integers by 9 and 11
- Math100
- · Replies 9 ·
Proof: Divisibility of Integers by 4
- Math100
- · Replies 5 ·
Proof: Integer Divisibility by 3 via Polynomials
- Math100
- · Replies 2 ·
Proof That an Integer is Divisible by 2
- Math100
- · Replies 3 ·
Finding constant related to random variable
- songoku
- · Replies 8 ·
Sailing along multiple Bearings Problem
- SiriusA
- · Replies 9 ·
If f(x)=(e^x+e^-x)/2, what is the inverse function?
- Darkmisc
- · Replies 16 ·
Using proof by contradiction with a single example
- Jonathanlikesmath
- · Replies 32 ·
Probability of getting the smallest value of cards
- songoku
- · Replies 9 ·
Solve the problem that involves a sector of a circle
- chwala
- · Replies 14 ·
Find the translation and stretch from ##y=2^x## to ##y=2^{x+4}##
- chwala
- · Replies 4 ·
Possible values an expression can take : ##\dfrac{x^2-x-6}{x-3}##
- brotherbobby
- · Replies 7 ·
Show the proof involving multiples of numbers
- chwala
- · Replies 19 ·
Find the missing digits in the calculation below
- Math100
- · Replies 13 ·
Application of N choose K, unsure of what is happening
- Jonathanlikesmath
- · Replies 6 ·
Find the missing digits in the calculations below
- Math100
- · Replies 2 ·
Is the integer ## (447836)_{9} ## divisible by ## 3 ## and ## 8 ##?
- Math100
- · Replies 12 ·
Expected value of median of rolling three fair dice
- Master1022
- · Replies 9 ·
Find the last two digits of the number ## 9^{9^{9}} ##.
- Math100
- · Replies 9 ·
The units digit of a triangular number iw ## 0, 1, 3, 5, 6 ##?
- Math100
- · Replies 1 ·
Any one of the integers ## 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ## can occur?
- Math100
- · Replies 3 ·
For any integer ## a ##, the units digit of ## a^{2} ## is?
- Math100
- · Replies 7 ·
Simplifying the Argument of a Complex Number
- songoku
- · Replies 19 ·
Binary exponentiation: compute 19^53 mod 503 and 141^47 mod 1537
- Math100
- · Replies 1 ·
All the possible posts in PF, all the possible human thoughts
- Delta2
- · Replies 23 ·
Proving that an Integer lies between x and y using Set Theory
- Hall
- · Replies 15 ·
Prove b ≡ c (mod n) where n = gcd(n₁, n₂)
- Math100
- · Replies 1 ·
Prove a≡c (mod n) given ab≡cd (mod n) and b≡d (mod n)
- Math100
- · Replies 3 ·
Prove that ## 89\mid (2^{44}-1) ## and ## 97\mid (2^{48}-1) ##
- Math100
- · Replies 5 ·
Prove that ## a^{({2}^{n})}\equiv 1\pmod {2^{n+2}} ## for any ##n##?
- Math100
- · Replies 6 ·
Counterexample: a^k ≡ b^k (mod n) and k ≡ j (mod n) doesn't imply a^j ≡ b^j (mod n)
- Math100
- · Replies 3 ·
Prove arithmetic progression forms complete residue system when gcd(a, n) = 1
- Math100
- · Replies 6 ·
Why is b^2 = 4 for this ellipse?
- Darkmisc
- · Replies 6 ·
How many cards can be taken at most while satisfying a certain rule?
- songoku
- · Replies 4 ·
Prove that ## aa_{1}, aa_{2}, ...., aa_{n} ## is also a complete set?
- Math100
- · Replies 14 ·
Show that ## {2n \choose n}\equiv 0\pmod {p} ##?
- Math100
- · Replies 5 ·