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.
Number of lines equidistant from four points on a plane
  • mahblah
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Chance of Selecting Twins from Group of 30 [Solved!]
  • tomwilliam
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24
Plotting points in three-dimensional space
  • member 731016
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8
Trying to understand the property of absolute value inequality
  • mark2142
  • · Replies 38 ·
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38
Using inverses to solve systems of equations
  • member 731016
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4
"Calculating Korifice Value in Cranes TP 410M, Problem 7-12
  • gmaverick2k
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6
Solve 2 Triangle Problem: Calculate Exact Value of x
  • YouAreAwesome
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7
Is it ok to assume matrices A and B as identity matrix?
  • vcsharp2003
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25
Find the GCD of the given complex numbers (Gaussian Integers)
  • chwala
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4
Solving Equations: Does Squaring Make False True?
  • mark2142
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20
Proving inverse of a 2 x 2 matrix is really an inverse
  • member 731016
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3
What Does Commutation Mean for Matrices A and B?
  • member 731016
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3
Problems in manipulating these 4 radical equations
  • mark2142
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8
Show that ##f(x)=2',1',2'## in the irreducible Polynomial
  • chwala
  • · Replies 8 ·
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8
Transformations to both sides of a matrix equation
  • vcsharp2003
  • · Replies 25 ·
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25
Is there a rule that states that I should not divide in this scenario?
  • Callmelucky
  • · Replies 10 ·
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10
Deriving algebraic definition of cross product
  • member 731016
  • · Replies 12 ·
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12
Free variables for a matrix in REF
  • member 731016
  • · Replies 3 ·
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3
Gauss-Jordan Elimination algorithm steps
  • member 731016
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1
Finding vectors parallel to a given vector
  • member 731016
  • · Replies 5 ·
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5
Identifying the type of expression
  • mark2142
  • · Replies 3 ·
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3
Finding the value of lambda so that two lines are parallel
  • member 731016
  • · Replies 6 ·
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6
What Are the Combinatorial Possibilities of Glucose Polymers with n Monomers?
  • bo reddude
  • · Replies 6 ·
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6
Interchanging x and y for inverse function
  • member 731016
  • · Replies 13 ·
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13
Solving an Asymmetrical Inequalities Problem: Seeking Light
  • Luckyroad21
  • · Replies 29 ·
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29
Cannot understand what ##(mod ~ \pi)## means in the given formula
  • vcsharp2003
  • · Replies 7 ·
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7
Is ##f(x)=2^{x}-1## considered an exponential function?
  • Callmelucky
  • · Replies 12 ·
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12
Trig Identities - Pre-calculus in a Nutshell - Section 4 Question 1
  • MichaelRocke
  • · Replies 24 ·
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24
3x3 matrix with complex numbers
  • CJovaras
  • · Replies 18 ·
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18
Inequality question -- Need help getting started...
  • member 731016
  • · Replies 7 ·
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7
Is it Possible for x^2 to Exceed 900?
  • mark2142
  • · Replies 32 ·
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32
Calculating the distance from a point to a plane
  • Darkmisc
  • · Replies 1 ·
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1
Why Does Flipping the Denominator in Complex Fractions Give the Wrong Answer?
  • member 731016
  • · Replies 9 ·
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9
Solving a nested logarithmic equation
  • brotherbobby
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2
Find all the ways of writing N into x^2-y^2
  • ver_mathstats
  • · Replies 8 ·
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8
Solving Plane Equation 3x + 2y -z = 4
  • Darkmisc
  • · Replies 8 ·
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8
Find the range of values of a + b
  • songoku
  • · Replies 6 ·
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6
How to Simplify This Trigonometric Equation Using Substitutions?
  • Fred1230
  • · Replies 4 ·
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4
Find the coordinates of D which lies on the vector BC
  • MathMan2022
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4
Two roads meeting a river at different angles (heights and distances)
  • brotherbobby
  • · Replies 7 ·
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7
Why is this result different? (calculating the sides of a triangle)
  • Callmelucky
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6
Make ##x## the subject of the formula
  • chwala
  • · Replies 15 ·
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15
Find the Area of the shaded region in the given problem
  • chwala
  • · Replies 1 ·
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1
I don't understand this step in turning this negative into a positive
  • Nathi ORea
  • · Replies 6 ·
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6
A formula involving the sum of cosines of the angles of a triangle
  • brotherbobby
  • · Replies 6 ·
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6
Algorithm problem involving 3 points and 3 lines in the x,y plane
  • sHatDowN
  • · Replies 7 ·
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7
Simplifying this complicated fraction
  • member 731016
  • · Replies 6 ·
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6
Finding the domain of a composite function
  • member 731016
  • · Replies 10 ·
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10
Prove that there are infinitely many primes of the form ## 6k+1 ##?
  • Math100
  • · Replies 12 ·
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12
How can I simplify 1/cuberoot(2)?
  • barryj
  • · Replies 13 ·
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13
Geometry: prove that point M is touched by 4 circles
  • Jiketz
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4
Justifying Equilateral Triangle AEF in ABCD
  • charlie05
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5
Is (y + z)x1 = (y1 + z1)x the equation of a straight line in 3D space?
  • sachin
  • · Replies 17 ·
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17
Solving a⁻¹ - b⁻¹ = b - a /(ab)
  • Nathi ORea
  • · Replies 13 ·
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Calculating Left Hand Limit: ##\sqrt 6##
  • MatinSAR
  • · Replies 17 ·
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Find an equivalent equation involving trig functions
  • nickek
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4
Find this unknown angle in the triangle
  • tato1982
  • · Replies 25 ·
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25
What Is the Next Step in Solving This Logarithmic Equation?
  • homeworkhelpls
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Find angle B in the trigonometry problem
  • chwala
  • · Replies 30 ·
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Solve the given trigonometry problem
  • chwala
  • · Replies 7 ·
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7
Solve the given equation that involves fractional indices
  • chwala
  • · Replies 39 ·
2
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39
Finding the angle between two vectors
  • chwala
  • · Replies 2 ·
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Solving an absolute value quadratic inequality
  • sylent33
  • · Replies 9 ·
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9
How to find z^n of a complex number
  • arhzz
  • · Replies 12 ·
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12
Probability of not getting a prize
  • vcsharp2003
  • · Replies 36 ·
2
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36
What are the implied domain and range of cos(arctan(x))?
  • Darkmisc
  • · Replies 3 ·
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3
Area of Quadrilateral inside a rectangle
  • songoku
  • · Replies 2 ·
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2
Are both sample spaces the same or do they mean different things?
  • vcsharp2003
  • · Replies 5 ·
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Geometry problem with arcs in a triangle
  • albertoita
  • · Replies 16 ·
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16
Writing a logarithm in a form not involving logarithms
  • Chijioke
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Solve the given vector problem
  • chwala
  • · Replies 1 ·
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1
Understanding Negative Velocity and Displacement on a Velocity-Time Graph
  • grzz
  • · Replies 7 ·
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7
Quadratic inequalities with absolute values
  • Callmelucky
  • · Replies 7 ·
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7
Triangle formed by straight lines
  • Einstein44
  • · Replies 43 ·
2
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43
Need Aid On This Problem Set (Combinations of Month Numbers in 10 Years)
  • BBBOB
  • · Replies 17 ·
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17
Formula for Xo and Yo for graph of quadratic function
  • Callmelucky
  • · Replies 2 ·
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2
Prove that ##AE=2BC## -Deductive Geometry
  • chwala
  • · Replies 52 ·
2
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Is it possible to find the range of this function?
  • vcsharp2003
  • · Replies 22 ·
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22
Limit question to be done without using derivatives
  • vcsharp2003
  • · Replies 25 ·
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25
Find the values of a and b in the given polynomial
  • chwala
  • · Replies 15 ·
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15
Show that ##P(X=2)=\dfrac{2}{15}##
  • chwala
  • · Replies 7 ·
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7
Choose a ball at random from a randomly selected box - alternative way
  • Rikudo
  • · Replies 10 ·
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10
Do We Need Boundaries for Fraction Equations?
  • Callmelucky
  • · Replies 21 ·
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21
Quadratic equation: Which way is correct? pic1 or pic2?
  • Callmelucky
  • · Replies 32 ·
2
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32
Complex numbers problem |z| - iz = 1-2i
  • Callmelucky
  • · Replies 20 ·
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20
Logarithm Questions - Solve Now!
  • Jouster
  • · Replies 3 ·
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3
How do you find the LCM and HCF?
  • chwala
  • · Replies 14 ·
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14
A problem related to divisibility
  • Rikudo
  • · Replies 3 ·
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3
Changing the base of a logarithm
  • Jouster
  • · Replies 7 ·
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7
How to apply BODMAS correctly in the given problem
  • chwala
  • · Replies 11 ·
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11
Stopping the Bus in 100m - Can it be done?
  • chwala
  • · Replies 4 ·
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4
Laws of Logarithms: Definition & Examples
  • Jouster
  • · Replies 8 ·
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8
Calculating Probability Using Bayes' Formula: Solving for P(urn III | silver)
  • stunner5000pt
  • · Replies 6 ·
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6
Prove that ## g(x)=f(x)\log {x}-\int_{2}^{x}t^{-1}f(t)dt ##.
  • Math100
  • · Replies 7 ·
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7
How Can I Solve a System of Equations With Complex Numbers?
  • Callmelucky
  • · Replies 19 ·
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19
Solve for ##x## in the Given Problem
  • chwala
  • · Replies 17 ·
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17
How Can I Solve ##1+i^3+i^5+...+i^{553}+i^{555}\ ?##
  • Callmelucky
  • · Replies 4 ·
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4
InWhat Situations Do We Enounter the Golden Ratio?
  • musicgold
  • · Replies 10 ·
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How to prove this using Abel's summation formula?
  • Math100
  • · Replies 9 ·
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9
Estimating the Gradient of a Graph: Student's Attempt
  • chwala
  • · Replies 11 ·
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11