Precalculus Mathematics Homework Help Forum

Post thread
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.
Stats Help Using Standard deviation and a population
Replies
5
Views
8K
Solving problems in function notation
Replies
3
Views
2K
How to interpret Cost Function?
Replies
28
Views
4K
Linear algebra - linear equation for a plane
Replies
15
Views
2K
Using Properties of Logarithms
Replies
22
Views
3K
Finding Equation of Rational Function
Replies
2
Views
2K
Arranging Identical Chips in a Circle: Combinatorics Question Explained
Replies
4
Views
3K
Prove by Induction: $w_k = w_{k-2} + k$
Replies
7
Views
2K
Finding Real Numbers: Questions (c) & (e) Solutions
Replies
2
Views
1K
Finding the Time: Solving a Rational Equation for Painting a Wall
Replies
3
Views
1K
Use iteration to guess an explicit formula
Replies
4
Views
2K
Colinear points in a vectorplane
Replies
4
Views
3K
Im not sure if this is right so I'm making sure.
Replies
4
Views
1K
Discover Inverse Functions for Equations with Exponents and Logarithms
Replies
4
Views
2K
What algebraic property can I use here?
Replies
5
Views
2K
Solving Trigonometry Problems: How to Find CE Using the Cosine Rule
Replies
9
Views
2K
Doublecheck reduction of rational expressions
Replies
2
Views
1K
How Can the Maclaurin Series Validate a Trigonometric Inequality?
Replies
4
Views
2K
Proving fixed point(s) exist w/ intermediate value theorem
Replies
13
Views
5K
Find common term for this sequence
Replies
3
Views
1K
Find Unknown Values in Table | Functional Relevance Homework
Replies
11
Views
2K
Calculating Dimensions of a Cylindrical Container with Given Volume
Replies
3
Views
2K
Can't find all the zeroes of a polynomial
Replies
19
Views
2K
Changing sign of data (regression)
Replies
1
Views
2K
Find the Union of Intervals: A_n
Replies
1
Views
1K
Sum of Deviations: Proving $\sum_{i=1}^Nv_i(v_i - \langle v \rangle) = 0$
Replies
3
Views
2K
Is the Function f(x) = x^2 Injective?
Replies
9
Views
2K
Fraction calculation, can't find mistake
Replies
24
Views
2K
Solving for n: power and log rules refresh
Replies
7
Views
2K
Trig identities (I think?) for precalc review
Replies
5
Views
2K
Solving exponential equation (using a graph)
Replies
17
Views
3K
Finding the limit of a quotient as x goes to minus infinity
Replies
6
Views
2K
Vector Cross Product Homework: Expand $\vec{v}\times({\nabla}{\times}\vec{A})$
Replies
2
Views
2K
Finding ∑fx and ∑fx^2 from the standard deviation and mean
Replies
4
Views
13K
Boolean algebra - is it possible to simplify this expression to 0
Replies
8
Views
2K
Slopes product = -1 <===> lines perpendicular
Replies
10
Views
2K
How to find this answer using logarithmic table?
Replies
10
Views
2K
Computer Sales in Canada: 1985-1995, 1.5M Reached
Replies
7
Views
3K
The Boolean Algebra XOR Problem: Are These Expressions Equivalent?
Replies
7
Views
2K
Solving Polynomial Inequalities
Replies
3
Views
2K
Finding the Radius of a Tangent Circumference in a Right Triangle
Replies
9
Views
2K
'Equating the coefficients' question
Replies
3
Views
2K
Sum of Sine and Cosine: Expressing Any Sum as C sin(α+ϕ)
Replies
5
Views
2K
Is Person A a Knight or a Knave on the Island?
Replies
7
Views
3K
Solving a Quadratic Equation with Two Variables
Replies
6
Views
1K
What are the properties of nonzero complex numbers satisfying z^2 = i\bar{z}?
Replies
14
Views
2K
Formula to detect direct or inverse related values
Replies
8
Views
2K
Geometry and Trig: finding an expression for an angle
Replies
3
Views
2K
Function Injectivity Subjectivity Proof
Replies
7
Views
2K
Why doesn't (8c1)(13c2) work for choosing a team with at least one woman?
Replies
2
Views
2K
How Do You Form a Degree 4 Polynomial with Given Complex Zeros?
Replies
7
Views
2K
Scattering in Finite step potential
Replies
2
Views
1K
What is the Domain of the Area Function for a Rectangle on a Parabola?
Replies
15
Views
4K
Find the center of the circle of curvature
Replies
6
Views
9K
Long Division and Remainder Theorem
Replies
5
Views
2K
Compute f°g & g°f: Domain & Codomain Explained
Replies
7
Views
2K
Characteristics of Polynomials
Replies
3
Views
1K
Find sin x expressed by a and b
Replies
10
Views
2K
Efficient Method for Finding Units in Number Theory Rings (Z12, ⊗, ⊕)
Replies
7
Views
2K
How Do You Find the Inverse of 5 in Z12?
Replies
12
Views
2K
Preparing "Adjusting Entries" Financial Accounting
Replies
5
Views
4K
Boolean algebra - distribution
Replies
12
Views
2K
Determinant of a 3x3 matrix via row reduction
Replies
6
Views
3K
If A, B are n order square matrices, and AB=0, then BA=0?
Replies
7
Views
6K
Solving trigonometric equation of a sum of unknowns
Replies
7
Views
2K
Sigma notation and calculator help(casio fx9860g; ti-30xpro)
Replies
8
Views
4K
If a^2 divides b^2, a divides b
Replies
3
Views
5K
Finding the sum of a series by grouping
Replies
5
Views
2K
Analog clock algebra word problem
Replies
22
Views
4K
Finding Surface Area in square feet with Volume & Thickness
Replies
4
Views
11K
Continuity of a Function at x=-3 - Proving c Value
Replies
9
Views
1K
Prove this is a right triangle in a sphere
Replies
20
Views
4K
Vectors: check if coordinates are in the same plane
Replies
12
Views
3K
Proving two simple matrix product properties
Replies
2
Views
2K
Volume of Object with Diameter 0.184 cm & 0.916 cm, Height 2.33 cm & 13.6 cm
Replies
14
Views
2K
Finding apparent depth real depth and refractive index
Replies
2
Views
3K
Find the equation of the plane parallel to two lines
Replies
6
Views
5K
When is x^n congruent to x^m (mod 3) for all x in Z^+?
Replies
2
Views
1K
Complex Numbers (Exponential/Rectangular Form)
Replies
5
Views
2K
Graph of trigonometric functions
Replies
4
Views
2K
Chances of player A winning a chess tournament?
Replies
12
Views
3K
Making something 1% larger than something
Replies
5
Views
2K
Trigonometric Equation Solving: Cosine and Sine Identities for Homework
Replies
5
Views
2K
How Do You Calculate Conditional Probability with Complements?
Replies
23
Views
3K
Prove by induction that r(r-1)(r+1) is an even integer
Replies
11
Views
2K
Probability of choosing stale donuts out of 24
Replies
3
Views
2K
Help me derive the Doppler effect ratio
Replies
6
Views
1K
Two body problem, deriving energy expression
Replies
2
Views
2K
Finding the Limit of a Complex Expression
Replies
8
Views
2K
What Are the Values of c and d for This Precalculus Limit Problem?
Replies
10
Views
2K
Simple Harmonic Motion - Getting Acceleration from Velocity
Replies
1
Views
2K
Rational roots of 4th degree polynomial with odd coefficents
Replies
17
Views
3K
Mean and Variance of a data set
Replies
1
Views
2K
What is the Probability of Hereditary Conditions in a Gaussian Distribution?
Replies
8
Views
2K
Classroom has 100 students -- probability of speaking a language
Replies
7
Views
7K
Understand Negative Power Conversions to Positive Fractions
Replies
4
Views
2K
Arithmetic and Geometric Series
Replies
9
Views
4K
What values of k make the proportion of observations with |di| ≥ k meaningful?
Replies
1
Views
1K
How Do You Convert Body Temperature from Celsius to Fahrenheit in Statistics?
Replies
7
Views
2K
Matrix Operations: Inverse Existence & Row Op.
Replies
18
Views
3K