Precalculus Mathematics Homework Help Forum

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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.
Finding area of a non right angled triangle
  • Eobardrush
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9
Surface area of a sphere ##= \pi * (a^2+b^2+c^2+d^2)##
  • Trysse
  • · Replies 18 ·
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18
Prove that ## a^{4}\equiv 0 ## or ## 1\pmod {5} ##?
  • Math100
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2
Prove that ## a^{3}\equiv 0, 1 ##, or ## 6\pmod {7} ##?
  • Math100
  • · Replies 1 ·
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1
Given an integer, find the probability its cube ends in 111
  • member 428835
  • · Replies 19 ·
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19
How do you know how many solutions there are for z?
  • Darkmisc
  • · Replies 2 ·
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2
If ## a ## is an odd integer, then ## a^{2}\equiv 1\pmod {8} ##?
  • Math100
  • · Replies 2 ·
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2
Show that ## (-13)^{n+1}\equiv (-13)^{n}+(-13)^{n-1}\pmod {181} ##?
  • Math100
  • · Replies 1 ·
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1
For ## n\geq 1 ##, use congruence theory to establish....
  • Math100
  • · Replies 3 ·
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3
Question about limits involving 1/x
  • docnet
  • · Replies 10 ·
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10
For ## n\geq 1 ##, use congruence theory to establish....
  • Math100
  • · Replies 1 ·
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1
For ## n\geq 1 ##, use congruence theory to establish....
  • Math100
  • · Replies 2 ·
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2
For ## n\geq 1 ##, use congruence theory to establish?
  • Math100
  • · Replies 2 ·
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2
Prove that the integer ## 53^{103}+103^{53} ## is divisible by....
  • Math100
  • · Replies 1 ·
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1
What is the remainder when the following sum is divided by 4?
  • Math100
  • · Replies 7 ·
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7
Solve the quadratic equation that involves sum and product
  • chwala
  • · Replies 1 ·
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1
Find the two values of the common ratio- Geometric sequence
  • chwala
  • · Replies 6 ·
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6
How to find the remainders when ## 2^{50} ## and ## 41^{65} ## are?
  • Math100
  • · Replies 1 ·
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1
Can a polynomial have an irrational coefficient?
  • barryj
  • · Replies 36 ·
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36
How many positive integer solutions satisfy this equation?
  • songoku
  • · Replies 43 ·
2
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43
Amount of money a player to receive
  • songoku
  • · Replies 8 ·
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8
Prove Homothetic Triangles Concurrent: Ceva's Theorem
  • subhradeep mahata
  • · Replies 1 ·
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1
Show that ## a^2\equiv b^2 \mod n ## need not imply that ## a\equiv b \mod n ##
  • Math100
  • · Replies 10 ·
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10
Volume of pyramid formed by center of 5 spheres inside a hemisphere
  • songoku
  • · Replies 17 ·
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17
Why have these endpoints been excluded?
  • Darkmisc
  • · Replies 2 ·
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2
Solve this problem that involves combinations
  • chwala
  • · Replies 1 ·
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1
How Do You Calculate Permutations for Complex Problems?
  • chwala
  • · Replies 1 ·
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1
How many quadrilaterals formed from n-gon no adjacent sides
  • member 428835
  • · Replies 22 ·
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22
Number of positive integer solutions for given equation
  • songoku
  • · Replies 5 ·
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5
What is the relationship between random walks and destinations?
  • member 428835
  • · Replies 29 ·
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29
Solve this problem that involves the factor theorem
  • chwala
  • · Replies 10 ·
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10
Evaluate ##\dfrac {x^\frac{3}{2}+xy}{xy-y^3}-\dfrac {\sqrt x}{\sqrt x -y}##
  • chwala
  • · Replies 13 ·
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13
Prove the given equation that involves indices
  • chwala
  • · Replies 14 ·
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14
Alternative Methods to Find Arithmetic Sequence's Common Ratio
  • chwala
  • · Replies 13 ·
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13
Prove that ## gcd(a, n)=gcd(b, n) ##.
  • Math100
  • · Replies 2 ·
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2
Solving this problem that involves the area of triangle
  • chwala
  • · Replies 40 ·
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40
Show that 13 is the largest prime that can divide....
  • Math100
  • · Replies 7 ·
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7
Prove that ## p_{n+3}^{2}<p_{n} p_{n+1} p_{n+2} ##
  • Math100
  • · Replies 10 ·
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10
If ## p ## and ## p^{2}+8 ## are both prime numbers, prove that....
  • Math100
  • · Replies 16 ·
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16
Use induction and the Bertrand conjecture to show that....
  • Math100
  • · Replies 10 ·
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10
If ## n>1 ##, show that ## n ## is never a perfect square
  • Math100
  • · Replies 49 ·
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49
Prove ## a/d\equiv b/d \mod n/d ##.
  • Math100
  • · Replies 2 ·
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2
Length of AD inside a triangle ABC
  • songoku
  • · Replies 5 ·
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5
Find how many points on a circle have an integer distance from other points
  • songoku
  • · Replies 19 ·
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19
Prove the following assertion: ## ca\equiv cb \mod cn ##.
  • Math100
  • · Replies 5 ·
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5
How Is E(S5) Calculated in a Poisson Process?
  • CTK
  • · Replies 2 ·
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2
Prove the following assertion about modular arithmetic
  • Math100
  • · Replies 1 ·
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1
Use Remainder theorem to find factors of ##(a-b)^3+(b-c)^3+(c-a)^3##
  • chwala
  • · Replies 4 ·
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4
Probability of getting arithmetic sequence from 3 octahedron dice
  • songoku
  • · Replies 11 ·
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11
Find the unknown values in the problem involving trigonometry graphs
  • chwala
  • · Replies 13 ·
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13
Every integer greater than 5 is the sum of three primes?
  • Math100
  • · Replies 4 ·
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4
Prove that the Goldbach conjecture that every even integer....
  • Math100
  • · Replies 6 ·
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6
Markov processes (Weight Suspended equally by n Cables)
  • CTK
  • · Replies 4 ·
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4
How many arrangements of these students on the committee?
  • neilparker62
  • · Replies 3 ·
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3
For n>3, show that the integers n, n+2, n+4 cannot all be prime
  • Math100
  • · Replies 27 ·
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27
How to calculate θ when you have sin(θ+α)
  • Darkmisc
  • · Replies 5 ·
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5
In 1752, Goldbach submitted the following conjecture to Euler?
  • Math100
  • · Replies 12 ·
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12
Find the set of possible values of ##a## - Modulus Graph
  • chwala
  • · Replies 7 ·
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7
Verify that the integers 1949 and 1951 are twin primes
  • Math100
  • · Replies 8 ·
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8
Find all pairs of primes ## p ## and ## q ## satisfying ## p-q=3 ##.
  • Math100
  • · Replies 2 ·
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2
Find the unknown values in the problem involving trigonometry graphs
  • chwala
  • · Replies 4 ·
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4
Show that the sum of twin primes ## p ## and ## p+2 ## is divisible?
  • Math100
  • · Replies 17 ·
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17
For ## n>1 ##, show that every prime divisor of ## n+1 ## is an odd integer
  • Math100
  • · Replies 9 ·
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9
Interpreting Statistical Questions: Ice Hockey Player Diff.
  • Pouyan
  • · Replies 5 ·
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5
Given that ## p\nmid n ## for all primes ## p\leq \sqrt[3]{n} ##
  • Math100
  • · Replies 4 ·
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4
Prove that if ## n>2 ##, then there exists a prime ## p ## satisfying....
  • Math100
  • · Replies 8 ·
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8
What is the Pattern for Finding the Missing Number in a Sequence?
  • member 428835
  • · Replies 6 ·
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6
B: Calculate the distance between two points without using a coordinate system
  • Trysse
  • · Replies 20 ·
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20
Solve the problem involving linear programming
  • chwala
  • · Replies 2 ·
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2
Calculate distance from a point 100m from a plane given two angles
  • robertadamplant
  • · Replies 3 ·
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3
Help Calculating Real Estate Tax
  • YoshiMoshi
  • · Replies 3 ·
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3
Confusing algebraic word problem
  • drooble122
  • · Replies 5 ·
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5
Some algebra I don't understand: Solve for R
  • Jaccobtw
  • · Replies 5 ·
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5
Prove that ##S## is a subspace of ##V##
  • peregrintkanin
  • · Replies 2 ·
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2
Show that any composite three-digit number must have a prime factor
  • Math100
  • · Replies 9 ·
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9
Sum of Infinite Series: Finding the Value of S
  • docnet
  • · Replies 10 ·
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10
The infinite limits of the probability transition matrix for Markov chain
  • Joe1998
  • · Replies 24 ·
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24
Proof of the trig identities for half-angles
  • chwala
  • · Replies 1 ·
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1
Find the area of the shaded region in the inscribed circle on square
  • chwala
  • · Replies 30 ·
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30
Why does the author's answer for (b) and (c) differ from my answer of 1-0.1k?
  • WMDhamnekar
  • · Replies 3 ·
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3
Find the mode, median and mean of the number of children
  • chwala
  • · Replies 7 ·
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7
Elements of Combinatorial Analysis
  • WMDhamnekar
  • · Replies 11 ·
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11
Is My Understanding of Poisson Distribution Correct for Different Area Sizes?
  • barryj
  • · Replies 16 ·
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16
Finding the Area of a Sector using Trigonometric Functions
  • chwala
  • · Replies 1 ·
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1
Need help with a question about powers of complex numbers
  • CoolKid223
  • · Replies 8 ·
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8
Choice, Chance and Sensible Logic
  • WMDhamnekar
  • · Replies 3 ·
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3
Find Co-ordinates of Point C in Problem Involving Straight Line Equations
  • chwala
  • · Replies 2 ·
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2
Method of detached coefficients division
  • drooble122
  • · Replies 4 ·
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4
Correct statement related to confidence interval
  • songoku
  • · Replies 4 ·
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4
Find the prime factorization of the integers 1234, 10140, and 36000?
  • Math100
  • · Replies 2 ·
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2
Solve for x and y in the given algebra problem involving fractions
  • chwala
  • · Replies 25 ·
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25
Find the minimum perimeter of a triangle with these constraints
  • songoku
  • · Replies 4 ·
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4
Conditional probability of a test records this positive result
  • songoku
  • · Replies 17 ·
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17
Find the value of ##5x+5y## in the given equation
  • chwala
  • · Replies 10 ·
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10
Solve for x in this inequality problem
  • chwala
  • · Replies 16 ·
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16
Find the percentage loss in the purchase and sale of bananas
  • chwala
  • · Replies 11 ·
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11
Need help in manipulating rational absolute value inequalities
  • bamajon1974
  • · Replies 11 ·
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11
Could there have been another value for Pi?
  • musicgold
  • · Replies 13 ·
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13
Definition of multiplying fractions -- help please
  • drooble122
  • · Replies 3 ·
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3
I don't understand this problem -- Surface area of a section of a solid sphere
  • samy4408
  • · Replies 11 ·
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11