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.
Find the ##r^{th}## term from beginning and end of ##(a+2x)^n##
  • RChristenk
  • · Replies 13 ·
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13
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Choose 6 pieces of candy from three flavors
  • RChristenk
  • · Replies 12 ·
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12
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Trying to resolve a volume calculation
  • narrator
  • · Replies 2 ·
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2
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Finding a conditional probability from joint p.d.f
  • Hamiltonian
  • · Replies 4 ·
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4
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A gardener collected 17 apples...
  • Hill
  • · Replies 32 ·
2
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32
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Prove that terms cyclic in ##a,b,c##, are in ##\text{AP}##
  • brotherbobby
  • · Replies 7 ·
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7
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Rounding Errors to nearest 10cm
  • paulb203
  • · Replies 26 ·
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26
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Solve the given inequality Q. 21
  • chwala
  • · Replies 2 ·
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2
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Question about the property of PDF
  • songoku
  • · Replies 8 ·
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8
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Show that these equations are linearly dependent using Mathematica
  • Lambda96
  • · Replies 6 ·
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6
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Quantitative reasoning problem
  • Chijioke
  • · Replies 5 ·
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5
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Find the sum of the coefficients of ##(x+y)^{16}##
  • RChristenk
  • · Replies 5 ·
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5
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Why is ##^{2m}C_m## equivalent to ##\dfrac{2m!}{m!m!}##?
  • RChristenk
  • · Replies 6 ·
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6
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Help please with De Moivre's Theorem (raising a complex number to a power)
  • Eng studies
  • · Replies 16 ·
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16
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Where Did ##(n−r+1)^{th}## Come From in Binomial Expansion?
  • RChristenk
  • · Replies 3 ·
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3
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Find the smallest integer ## a>2 ## such that ## 2\mid a ##
  • Math100
  • · Replies 3 ·
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3
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2K
Optimizing Null Space Solutions: How to Remove Zeros in Rank Deficient Matrices
  • mido hoss
  • · Replies 10 ·
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10
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Complex mapping z ↦ ω = (z − a)/(z − b)
  • Hill
  • · Replies 5 ·
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5
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Partial Permutation, Combination question for buying dogs at the pet store
  • Memo
  • · Replies 19 ·
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19
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How can we fairly distribute food among four people with different appetites?
  • robax25
  • · Replies 27 ·
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27
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What is a point of using complex numbers here?
  • Hill
  • · Replies 3 ·
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3
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How Many Type A Pigs Have 3 DYL Blood in a Herd of 1,000?
  • Memo
  • · Replies 21 ·
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21
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Combination, partial permutation
  • Memo
  • · Replies 1 ·
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1
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Drawing marked balls from an urn
  • Hamiltonian
  • · Replies 10 ·
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10
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Basic counting methods — integers between 1 and 100 that are divisible by 7
  • stunner5000pt
  • · Replies 19 ·
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19
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Where Did I Go Wrong When Solving Inequalities With Negative Numbers?
  • paulb203
  • · Replies 8 ·
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8
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S=u*t+a*t^2/2 VS ratio 1:2:3:5... t1/t10= ...
  • Steels
  • · Replies 8 ·
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8
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3K
Find an integer having the remainders ## 1, 2, 5, 5 ##
  • Math100
  • · Replies 7 ·
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7
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Basic combinatorics: How many ways can 4 boys and 4 girls sit in a row such that no 2 girls sit together?
  • tellmesomething
  • · Replies 27 ·
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27
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A railway carriage will accommodate 5 passengers on each side
  • RChristenk
  • · Replies 4 ·
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4
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2K
Volume and surface area of "One World Trade Center"
  • Hyydrxzen
  • · Replies 6 ·
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6
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3K
Probability related to cumulative distribution function
  • songoku
  • · Replies 4 ·
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4
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2K
Two link planar robot elbow errors in textbook (Inverse kinematics)
  • Ineedhelpwithphysics
  • · Replies 3 ·
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3
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Poisson Probability Distribution Problem
  • Callix
  • · Replies 19 ·
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19
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Find the value of ##k^2## in the problem involving trigonometry
  • chwala
  • · Replies 7 ·
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7
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Ratio of the sum of ##n## terms of two AP series
  • brotherbobby
  • · Replies 9 ·
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9
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Decompose 4x4 determinant into 24 determinants -- How many are zero?
  • zenterix
  • · Replies 1 ·
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1
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Solve ## 4x+51y=9: x=15+51t, y=-1-4t ##
  • Math100
  • · Replies 2 ·
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2
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Solve the equation: ##\tan x ⋅\tan 4x = 1##
  • chwala
  • · Replies 4 ·
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4
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Is My Proof That ab<a Correct Given 0<a<1 and 0<b<1?
  • knowLittle
  • · Replies 4 ·
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4
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Understanding Cubic Factorization: Solving for Roots with a and -2a
  • Argonaut
  • · Replies 6 ·
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6
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Identifying matrices as REF, RREF, or neither
  • crememars
  • · Replies 1 ·
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1
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Limit to Infinity of Quotient with Square Root - Reducing the Equation
  • njh
  • · Replies 8 ·
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8
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Proving a trigonometric identity with ##\sin^4## s and ##\cos^4## s
  • brotherbobby
  • · Replies 12 ·
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12
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Binomial Theorem - determine the term with...
  • stunner5000pt
  • · Replies 18 ·
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18
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Roots of a polynomial mixed with a trigonometric function
  • vcsharp2003
  • · Replies 14 ·
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14
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Difference between -3² and (-3)² ?
  • gary350
  • · Replies 53 ·
2
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53
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Matrices: if AB=A and BA=B, then B^2 is equal to?
  • Rikudo
  • · Replies 18 ·
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18
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Are the following statements true? (1) a∈{{a},{a,b}} and (2) b∈{{a},{a,b}} true?
  • john-ice2023
  • · Replies 8 ·
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8
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Find the smallest value of angle ##α + β ##
  • chwala
  • · Replies 11 ·
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11
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An inequality involving ##x## on both sides: ##\sqrt{x+2}\ge x##
  • brotherbobby
  • · Replies 3 ·
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3
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3K
Solve the problem that involves ##\cos^{-1} x + \cos^{-1}y##
  • chwala
  • · Replies 3 ·
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3
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2K
Solve the given problem involving: ##\tan^{-1} (2x+1)+ \tan^{-1} (2x-1)##
  • chwala
  • · Replies 10 ·
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10
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Solve the problem that involves diameter of the Bullseye
  • chwala
  • · Replies 2 ·
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2
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Partial Fraction Decomposition
  • hackedagainanda
  • · Replies 4 ·
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4
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Prove that the given inverse trigonometry equation is correct
  • chwala
  • · Replies 5 ·
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5
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Show that the ratio ##x+y:x-y## is increased by subtracting ##y##
  • RChristenk
  • · Replies 4 ·
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4
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I don't get a step with this quadratic question
  • Nathi ORea
  • · Replies 12 ·
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12
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Solve these simultaneous equations
  • chwala
  • · Replies 6 ·
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6
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Solve the given simultaneous equations
  • chwala
  • · Replies 8 ·
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8
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Is ##9\sqrt[3]{-3}## Equivalent to ##-9\sqrt[3]{3}##?
  • RChristenk
  • · Replies 4 ·
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4
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Solve the given simultaneous equations in x^2, x and y
  • chwala
  • · Replies 1 ·
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1
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Solve the simultaneous equations involving x, y, and their squares
  • chwala
  • · Replies 2 ·
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2
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Simplifying (b-a)/(a-b): A Scientific Approach
  • Nathi ORea
  • · Replies 10 ·
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10
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Question about this technique for solving simultaneous equations
  • chwala
  • · Replies 4 ·
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4
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Number of ways to partition n persons and probability to form n groups
  • songoku
  • · Replies 10 ·
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10
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Applications of algebraic expressions
  • MatinSAR
  • · Replies 6 ·
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6
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Probability using combinations or alternatives
  • njh
  • · Replies 12 ·
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12
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3K
Basic probability question (1 boy + 2 girls of a group of 7)
  • MathMan2022
  • · Replies 6 ·
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6
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Find the total number of ways of coloring the eight regions
  • feesicksman
  • · Replies 7 ·
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7
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Question about permutation formula -- How to use the formula when r = 0 ?
  • songoku
  • · Replies 6 ·
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6
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Discover Circle Theorem Help for Triangle PST: PSR Angle = 77 Degrees
  • Chijioke
  • · Replies 1 ·
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1
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Find the area of the quadrilateral OCBAO
  • chwala
  • · Replies 8 ·
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8
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Calculating Cable Turns for a Job
  • Brian82784
  • · Replies 5 ·
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5
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Solve the problem that involves iteration
  • chwala
  • · Replies 21 ·
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21
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Solve the given problem involving functions: f(x)=|ax-b| and y=f(x)+c
  • chwala
  • · Replies 19 ·
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19
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Solve the given problem involving logarithms
  • chwala
  • · Replies 18 ·
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18
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Prove this variation: If a+b ∝ a-b, prove that a^2+b^2 ∝ ab
  • RChristenk
  • · Replies 11 ·
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11
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3K
Proving trig identities -- Is the method related to the unit circle?
  • member 731016
  • · Replies 54 ·
2
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54
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Derivative of a piecewise function
  • MatinSAR
  • · Replies 6 ·
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6
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Solving for a, b, and c in this equation for $ revenue for a circus
  • PhysicsInept
  • · Replies 4 ·
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4
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2K
Solve the given problem that involves binomial theorem
  • chwala
  • · Replies 2 ·
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2
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Ideal Straight Line Fit for a Temperature Sensor Output
  • Fenrir
  • · Replies 2 ·
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2
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How Did 1886 Dutch Students Solve This Complex Math Problem?
  • BvU
  • · Replies 34 ·
2
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34
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Finding compound interest formula
  • member 731016
  • · Replies 2 ·
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2
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Solve the given problem that involves Trigonometry
  • chwala
  • · Replies 7 ·
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7
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Find the possible values of angle ##∠ADB##
  • chwala
  • · Replies 2 ·
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2
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Determine the position vector of ##C##
  • chwala
  • · Replies 1 ·
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1
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Prove that these three ratios are equivalent
  • RChristenk
  • · Replies 11 ·
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11
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Adding square roots of ##i## leading to different answers!
  • brotherbobby
  • · Replies 21 ·
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21
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2K
How Did the Author Derive the Perfect Square from the Algebraic Equation?
  • MiddleEast
  • · Replies 5 ·
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5
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Vector addition and subtraction
  • Slimy0233
  • · Replies 13 ·
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13
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2K
Calculating Radius & Water Depth of a Spherical Bowl
  • Chijioke
  • · Replies 7 ·
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7
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4K
Evaluating the angle theta using inverse sin
  • Mohmmad Maaitah
  • · Replies 4 ·
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4
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Finding the solution to system of 3 equations with 3 unknowns
  • member 731016
  • · Replies 2 ·
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2
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Complex numbers confusion (how they got this expression in orange to become -1)
  • member 731016
  • · Replies 25 ·
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25
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3K
Conceptual question on equations of the form ##x=ay^2+by+c##
  • chwala
  • · Replies 5 ·
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5
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2K
How Do You Form a Linear Equation for the Equipment's Value Over 10 Years?
  • nycmathguy
  • · Replies 3 ·
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3
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3K
Is it possible to find a number x such that 5 < x < 1?
  • member 731016
  • · Replies 26 ·
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26
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If 1=5, 2=25, 3=125,4=1880, 5=?
  • Lay1
  • · Replies 8 ·
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8
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5K