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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If a is not divisible by 2 or 3, then a² ≡ 1 (mod 24)
- Math100
- · Replies 9 ·
Finding area of a non right angled triangle
- Eobardrush
- · Replies 9 ·
Surface area of a sphere ##= \pi * (a^2+b^2+c^2+d^2)##
- Trysse
- · Replies 18 ·
Prove that ## a^{4}\equiv 0 ## or ## 1\pmod {5} ##?
- Math100
- · Replies 2 ·
Prove that ## a^{3}\equiv 0, 1 ##, or ## 6\pmod {7} ##?
- Math100
- · Replies 1 ·
Given an integer, find the probability its cube ends in 111
- member 428835
- · Replies 19 ·
How do you know how many solutions there are for z?
- Darkmisc
- · Replies 2 ·
If ## a ## is an odd integer, then ## a^{2}\equiv 1\pmod {8} ##?
- Math100
- · Replies 2 ·
Show that ## (-13)^{n+1}\equiv (-13)^{n}+(-13)^{n-1}\pmod {181} ##?
- Math100
- · Replies 1 ·
Prove 7 divides 5^(2n) + 3·2^(5n-2) using congruences
- Math100
- · Replies 3 ·
Is 1/x bounded above for positive x?
- docnet
- · Replies 10 ·
Prove 43 divides 6^(n+2)+7^(2n+1) for all n≥1
- Math100
- · Replies 1 ·
Prove 27 divides 2^(5n+1) + 5^(n+2) for n ≥ 1
- Math100
- · Replies 2 ·
For ## n\geq 1 ##, use congruence theory to establish?
- Math100
- · Replies 2 ·
Divisibility of 53^103 + 103^53 by 39 and 111^333 + 333^111 by 7
- Math100
- · Replies 1 ·
What is the remainder when the following sum is divided by 4?
- Math100
- · Replies 7 ·
Solve the quadratic equation that involves sum and product
- chwala
- · Replies 1 ·
Find the two values of the common ratio- Geometric sequence
- chwala
- · Replies 6 ·
How to find the remainders when ## 2^{50} ## and ## 41^{65} ## are?
- Math100
- · Replies 1 ·
Can a polynomial have an irrational coefficient?
- barryj
- · Replies 36 ·
How many positive integer solutions satisfy this equation?
- songoku
- · Replies 43 ·
Amount of money a player to receive
- songoku
- · Replies 8 ·
Prove Homothetic Triangles Concurrent: Ceva's Theorem
- subhradeep mahata
- · Replies 1 ·
Show that ## a^2\equiv b^2 \mod n ## need not imply that ## a\equiv b \mod n ##
- Math100
- · Replies 10 ·
Volume of pyramid formed by center of 5 spheres inside a hemisphere
- songoku
- · Replies 17 ·
Why have these endpoints been excluded?
- Darkmisc
- · Replies 2 ·
Alternative approach to selecting cousins using combinations
- chwala
- · Replies 1 ·
How Do You Calculate Permutations for Complex Problems?
- chwala
- · Replies 1 ·
How many quadrilaterals formed from n-gon no adjacent sides
- member 428835
- · Replies 22 ·
Positive integer solutions to x + y + 2z = n for odd n
- songoku
- · Replies 5 ·
What is the relationship between random walks and destinations?
- member 428835
- · Replies 29 ·
Factor theorem: finding k and p in 4x³+kx²+px+2
- chwala
- · Replies 10 ·
Evaluate ##\dfrac {x^\frac{3}{2}+xy}{xy-y^3}-\dfrac {\sqrt x}{\sqrt x -y}##
- chwala
- · Replies 13 ·
Prove the given equation that involves indices
- chwala
- · Replies 14 ·
Alternative Methods to Find Arithmetic Sequence's Common Ratio
- chwala
- · Replies 13 ·
Prove that ## gcd(a, n)=gcd(b, n) ##.
- Math100
- · Replies 2 ·
Finding height from point O to line AB in triangle problem
- chwala
- · Replies 40 ·
Largest prime dividing n² + 3 and (n+1)² + 3
- Math100
- · Replies 7 ·
Prove that ## p_{n+3}^{2}<p_{n} p_{n+1} p_{n+2} ##
- Math100
- · Replies 10 ·
If p and p² + 8 are both prime, prove p³ + 4 is prime
- Math100
- · Replies 16 ·
Prove p_n < sum of first n-1 primes using induction and Bertrand's conjecture
- Math100
- · Replies 10 ·
If ## n>1 ##, show that ## n ## is never a perfect square
- Math100
- · Replies 49 ·
Prove ## a/d\equiv b/d \mod n/d ##.
- Math100
- · Replies 2 ·
Length of AD inside a triangle ABC
- songoku
- · Replies 5 ·
Find how many points on a circle have an integer distance from other points
- songoku
- · Replies 19 ·
Prove the following assertion: ## ca\equiv cb \mod cn ##.
- Math100
- · Replies 5 ·
How Is E(S5) Calculated in a Poisson Process?
- CTK
- · Replies 2 ·
Prove the following assertion about modular arithmetic
- Math100
- · Replies 1 ·
Use Remainder theorem to find factors of ##(a-b)^3+(b-c)^3+(c-a)^3##
- chwala
- · Replies 4 ·
Probability of getting arithmetic sequence from 3 octahedron dice
- songoku
- · Replies 11 ·
Find the unknown values in the problem involving trigonometry graphs
- chwala
- · Replies 13 ·
Every integer greater than 5 is the sum of three primes?
- Math100
- · Replies 4 ·
Prove that the Goldbach conjecture that every even integer....
- Math100
- · Replies 6 ·
Markov processes (Weight Suspended equally by n Cables)
- CTK
- · Replies 4 ·
How many arrangements of these students on the committee?
- neilparker62
- · Replies 3 ·
For n>3, show that the integers n, n+2, n+4 cannot all be prime
- Math100
- · Replies 27 ·
How to calculate θ when you have sin(θ+α)
- Darkmisc
- · Replies 5 ·
In 1752, Goldbach submitted the following conjecture to Euler?
- Math100
- · Replies 12 ·
Find the set of possible values of ##a## - Modulus Graph
- chwala
- · Replies 7 ·
Verify that the integers 1949 and 1951 are twin primes
- Math100
- · Replies 8 ·
Find all pairs of primes ## p ## and ## q ## satisfying ## p-q=3 ##.
- Math100
- · Replies 2 ·
Finding amplitude A in trigonometry graph equation
- chwala
- · Replies 4 ·
Show that the sum of twin primes ## p ## and ## p+2 ## is divisible?
- Math100
- · Replies 17 ·
For ## n>1 ##, show that every prime divisor of ## n+1 ## is an odd integer
- Math100
- · Replies 9 ·
Interpreting Statistical Questions: Ice Hockey Player Diff.
- Pouyan
- · Replies 5 ·
Given that ## p\nmid n ## for all primes ## p\leq \sqrt[3]{n} ##
- Math100
- · Replies 4 ·
Prime factor of n!-1 between n and n!
- Math100
- · Replies 8 ·
What is the Pattern for Finding the Missing Number in a Sequence?
- member 428835
- · Replies 6 ·
B: Calculate the distance between two points without using a coordinate system
- Trysse
- · Replies 20 ·
Solve the problem involving linear programming
- chwala
- · Replies 2 ·
Calculate distance from a point 100m from a plane given two angles
- robertadamplant
- · Replies 3 ·
Why use ceiling function for real estate tax with fractional units
- YoshiMoshi
- · Replies 3 ·
Confusing algebraic word problem
- drooble122
- · Replies 5 ·
Some algebra I don't understand: Solve for R
- Jaccobtw
- · Replies 5 ·
Prove that ##S## is a subspace of ##V##
- peregrintkanin
- · Replies 2 ·
Show that any composite three-digit number must have a prime factor
- Math100
- · Replies 9 ·
Rearranging a divergent series to get S=1/2
- docnet
- · Replies 10 ·
The infinite limits of the probability transition matrix for Markov chain
- Joe1998
- · Replies 24 ·
Proof of the trig identities for half-angles
- chwala
- · Replies 1 ·
Find the area of the shaded region in the inscribed circle on square
- chwala
- · Replies 30 ·
Why does the author's answer for (b) and (c) differ from my answer of 1-0.1k?
- WMDhamnekar
- · Replies 3 ·
Find the mode, median and mean of the number of children
- chwala
- · Replies 7 ·
Elements of Combinatorial Analysis
- WMDhamnekar
- · Replies 11 ·
Is My Understanding of Poisson Distribution Correct for Different Area Sizes?
- barryj
- · Replies 16 ·
Finding the Area of a Sector using Trigonometric Functions
- chwala
- · Replies 1 ·
Solving (z-3)³=-8 for all complex solutions
- CoolKid223
- · Replies 8 ·
Choice, Chance and Sensible Logic
- WMDhamnekar
- · Replies 3 ·
Find Co-ordinates of Point C in Problem Involving Straight Line Equations
- chwala
- · Replies 2 ·
Method of detached coefficients division
- drooble122
- · Replies 4 ·
Correct statement related to confidence interval
- songoku
- · Replies 4 ·
Find the prime factorization of the integers 1234, 10140, and 36000?
- Math100
- · Replies 2 ·
Solve for x and y in the given algebra problem involving fractions
- chwala
- · Replies 25 ·
Find the minimum perimeter of a triangle with these constraints
- songoku
- · Replies 4 ·
Conditional probability of a test records this positive result
- songoku
- · Replies 17 ·
Find the value of ##5x+5y## in the given equation
- chwala
- · Replies 10 ·
Solve for x in this inequality problem
- chwala
- · Replies 16 ·
Find the percentage loss in the purchase and sale of bananas
- chwala
- · Replies 11 ·
Bounding rational expressions with absolute value constraints
- bamajon1974
- · Replies 11 ·
Could pi have a different mathematical value?
- musicgold
- · Replies 13 ·
What does this definition of multiplication mean?
- drooble122
- · Replies 3 ·