Precalculus Mathematics Homework Help Forum

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.

Threads

Speed of a plane given distance and time equation.

  • brandy
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1

Proving sum of cubes formula by induction with simpler algebra

  • iainfs
  • · Replies 5 ·
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5

What is the proof for sin(45+x).sin(45-x) = \frac{1}{2}cos2x?

  • DERRAN
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3

Can the set of x be found for -1 ≤ 1/(1+cosx) ≤ 1?

  • IsrTor
  • · Replies 2 ·
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2

How to solve a complex equation using quadratic formula

  • username12345
  • · Replies 3 ·
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3

Law of Sines and alternate interior angles?

  • benign.psycho
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1
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7

How do i solve this trig question? identities etc?

  • Dell
  • · Replies 6 ·
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6

Set- i do not understand the question

  • icystrike
  • · Replies 5 ·
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5

Ratio of surface areas and volumes for two spheres with different diameters

  • Paradiselovek
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1

What is the Limit of the Half Bracket Operator?

  • icosane
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3

Expected value of Poisson and normal distributions

  • ongfufu
  • · Replies 3 ·
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3

Solving for r when λ < r³/(r+1) with r > 0

  • azdang
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2

How Do You Solve Trigonometric Equations Involving Cosine and Sine?

  • andrelutz001
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3

Why isn't the change of base rule working for log₂ x + log₄ x = 2?

  • tweety1234
  • · Replies 8 ·
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8

Distance between two helicopters and interception time

  • physicsneek
  • · Replies 3 ·
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3

If h(x) and g(x) are inverse functions, what are g[h(3)] and h[g(3)]?

  • lilbite
  • · Replies 9 ·
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9

Sum and product of roots in biquadratic equations

  • Noiro
  • · Replies 2 ·
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2

Simplify 1/4ln(x+2) + 1/3ln(x+3)

  • cragar
  • · Replies 3 ·
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3

Mean Deviation Calculation for Chemistry Lab

  • synergix
  • · Replies 2 ·
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2
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1

Finding the Values of (Theta): Solving cos2theta = 1/4

  • ibysaiyan
  • · Replies 1 ·
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1

Composition of Functions (check me)

  • Lynne
  • · Replies 1 ·
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1

Finding vertical asymptotes for (x-1)/(1-x²)

  • TrueStar
  • · Replies 6 ·
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6

Percentage of data values between 215 and 305 using Chebyshev's theorem

  • anita010963
  • · Replies 2 ·
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2

Constructing an isomorphism between two 25-element groups

  • adkinsc
  • · Replies 8 ·
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8

Constructing a Rational Function with Given Asymptotes and Intercepts

  • TrueStar
  • · Replies 2 ·
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2

Proof by Induction: Proving the Sum of Squares Identity

  • fluppocinonys
  • · Replies 6 ·
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6

Finding Extreme Values of a Function in a Given Interval

  • Ofey
  • · Replies 2 ·
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2

Doing some how many combinations calculation

  • Compaq
  • · Replies 4 ·
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4

Solving 4x for sin^-1(1) between -pi and pi

  • spynjr
  • · Replies 2 ·
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2

Understanding Complex Numbers and Their Proof: A Step-by-Step Explanation

  • Perillux
  • · Replies 2 ·
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2

Statistics Confidence Intervals

  • sjooff111
  • · Replies 1 ·
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1

Solving 3^(2x) - 36·3^x = -243 and 5(x+2)² = 80

  • juliany
  • · Replies 1 ·
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1

How does data transformation affect regression slope?

  • steven10137
  • · Replies 3 ·
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3

Quick simple indentity explanation needed

  • amd123
  • · Replies 2 ·
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2

Finding the Minimum Value of AC in a Triangle with Given Side Lengths

  • tweety1234
  • · Replies 6 ·
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6

How Do You Solve Trigonometric Equations for Specific Angle Measures?

  • Oscar Wilde
  • · Replies 5 ·
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5

Solving Fiber Optics Glass Characteristic Equations with Maple

  • windsupernova
  • · Replies 3 ·
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3
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2

Formula for this combination problem

  • rhonkie
  • · Replies 2 ·
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2
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16

What does 'write A as a product of 4 elementary matrices' mean?

  • LaraCroft
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2
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14
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1

Trouble with Inequalities problem

  • crays
  • · Replies 2 ·
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2

Can (1+4t+4t^2)^(1/2) * (1+4t+4t^2)^(3/2) Be Simplified to (1+4t+4t^2)^2?

  • afcwestwarrior
  • · Replies 1 ·
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1

Is the Empty Set Open or Closed in Topology?

  • soopo
  • · Replies 11 ·
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11

System of equations 4 variable

  • synergix
  • · Replies 5 ·
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5

Finding terms from arithmetic series formula 1/2(3-n)

  • kwuk
  • · Replies 1 ·
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1

Finding the Intersection of Sets X and Y with Algebraic Methods

  • yorick
  • · Replies 3 ·
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3

Some proofs involving greatest common divisors

  • Andrusko
  • · Replies 1 ·
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1

Proving (csc x + cot x)/(tan x + sin x)=cot x*csc x with SOHCAHTOA

  • wes28
  • · Replies 2 ·
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2

Point of intersection for sine and cosine functions

  • reedy
  • · Replies 10 ·
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10

Finding the equations of a graph

  • Missionz12
  • · Replies 3 ·
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3

Differet Types of Mathematical Arguments and Proofs

  • soopo
  • · Replies 3 ·
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3

Find the equation of the polynomial

  • Noir
  • · Replies 1 ·
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1

Where can I find a complete logarithmic formulas worksheet or tutorial?

  • MrAnderson
  • · Replies 2 ·
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2

Probability of bridge collapsing

  • Sportsman4920
  • · Replies 2 ·
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2

What's the PDF of a Unit Sphere Projection on the X-Axis?

  • Micle
  • · Replies 3 ·
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3

Solve Natural Logarithms ln(x+1)+ln(x+3) < ln(x+7)

  • Compaq
  • · Replies 8 ·
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8

Slope of line based on one point and area of triangle

  • snailshell
  • · Replies 2 ·
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2

How to solve sqrt(25) + sqrt(30)?

  • Stratosphere
  • · Replies 7 ·
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7

Simplifying a nested complex fraction with repeated structure

  • Raizy
  • · Replies 12 ·
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12

Sketching Absolute value graphs

  • w0lfed
  • · Replies 5 ·
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5

Maintaining Volume in a Cylinder: Solving for the Necessary Radius Adjustment

  • Paradiselovek
  • · Replies 2 ·
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2

Using Induction to Prove 2^n >= n+1 for Natural Numbers

  • roam
  • · Replies 4 ·
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4

Equation of Perpendicular Bisector

  • TbbZz
  • · Replies 4 ·
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4
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4

Counterexample to (u + v)² ≠ u² + v²

  • relyt
  • · Replies 12 ·
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12

Find the inverse of the function

  • HOFBrINCl
  • · Replies 7 ·
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7

Polynomial Roots and Synthetic Division

  • shemer77
  • · Replies 8 ·
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8

Why Is My Algebraic Solution Incorrect?

  • tinkus
  • · Replies 4 ·
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4

Finding maximum rate of change in vehicle tunnel traffic model

  • chrisyuen
  • · Replies 2 ·
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2

Finding a quartic function from sign conditions and zeros

  • Alana456
  • · Replies 2 ·
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2

Solving Equations: 2 Equations, 1 Unknown Variable

  • khatche4
  • · Replies 2 ·
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2

Verifying four trigonometric identities

  • amd123
  • · Replies 5 ·
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5

Rewriting expression of logarithm

  • nlsed
  • · Replies 3 ·
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3

Solving for x in y = (x+4)/(x+3): Is it Possible?

  • JKaufinger
  • · Replies 2 ·
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2

Binomial Distribution Probability Problem

  • mkir
  • · Replies 5 ·
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5

How to Solve Trigonometric Word Problems Correctly?

  • amd123
  • · Replies 5 ·
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5

Calculating Work Done on a Box Being Pulled up a Ramp

  • unknown101
  • · Replies 3 ·
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3

Prove Invertibility of I+A When A^k=0

  • kidsmoker
  • · Replies 5 ·
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5

Testing series for convergence

  • DorianG
  • · Replies 2 ·
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2

Prove the SAS Triangle Similarity Theorem from Trigonometry

  • Lazerlike42
  • · Replies 2 ·
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2

Solving inequalities and equations with absolute values

  • w0lfed
  • · Replies 4 ·
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4

Solving Radical Equations: Multiplying and Simplifying Roots

  • Stratosphere
  • · Replies 3 ·
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3

Equivalence Problem: Is A and B Equivalent?

  • soopo
  • · Replies 6 ·
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6

Heine-Porel from Bolzano-Weierstrass

  • soopo
  • · Replies 3 ·
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3

Why Do Some Solutions Satisfy One Equation But Not the System?

  • Niles
  • · Replies 2 ·
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2

Is a Cauchy Sequence Always Convergent?

  • soopo
  • · Replies 5 ·
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5
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1

Proof of a simple logic statement

  • soopo
  • · Replies 3 ·
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3

Proof of the incenter formula in 3D coordinates

  • ritwik06
  • · Replies 3 ·
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3

Statistics(moment generating function)

  • thandu3
  • · Replies 5 ·
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5

Creating a Rule for A^n Matrix Power

  • ronicencen
  • · Replies 6 ·
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6

Forget No More: How to Find a Turning Point in a Quadratic Graph

  • Michael17
  • · Replies 3 ·
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3

I with a Complex Rational Expression

  • Charlie123
  • · Replies 7 ·
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7

Completing Square and quadratics

  • physics2
  • · Replies 3 ·
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3

Proving the Half-Angle Formula for Tangent Using Trigonometric Identities

  • xonicole
  • · Replies 3 ·
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3