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.
Trying to resolve a volume calculation
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645
Finding a conditional probability from joint p.d.f
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4
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589
A gardener collected 17 apples...
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32
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933
Prove that terms cyclic in ##a,b,c##, are in ##\text{AP}##
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7
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Rounding Errors to nearest 10cm
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26
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Solve the given inequality Q. 21
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2
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593
Question about the property of PDF
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8
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Show that these equations are linearly dependent using Mathematica
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6
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691
Quantitative reasoning problem
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5
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623
Find the sum of the coefficients of ##(x+y)^{16}##
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5
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589
Why is ##^{2m}C_m## equivalent to ##\dfrac{2m!}{m!m!}##?
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6
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718
Help please with De Moivre's Theorem (raising a complex number to a power)
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16
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In the expansion of ##(1+x)^n##, the coefficients of terms equidistant from the beginning and the end are equal
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3
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699
Find the smallest integer ## a>2 ## such that ## 2\mid a ##
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3
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955
Optimizing Null Space Solutions: How to Remove Zeros in Rank Deficient Matrices
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10
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650
Complex mapping z ↦ ω = (z − a)/(z − b)
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5
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575
Partial Permutation, Combination question for buying dogs at the pet store
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19
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870
How can we fairly distribute food among four people with different appetites?
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27
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640
What is a point of using complex numbers here?
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3
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545
Statistics and Probabilities: How many type A pigs from the farm's herd of 1,000 pigs have 3 DYL blood?
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21
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691
Combination, partial permutation
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466
Drawing marked balls from an urn
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10
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844
Basic counting methods — integers between 1 and 100 that are divisible by 7
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19
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1K
Inequalities With negative numbers and switching x -- therefore switching the sign
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8
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512
S=u*t+a*t^2/2 VS ratio 1:2:3:5... t1/t10= ...
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8
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857
Find an integer having the remainders ## 1, 2, 5, 5 ##
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7
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1K
Basic combinatorics: How many ways can 4 boys and 4 girls sit in a row such that no 2 girls sit together?
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27
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1K
A railway carriage will accommodate 5 passengers on each side
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4
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669
MHB Volume and surface area of "One World Trade Center"
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6
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2K
Probability related to cumulative distribution function
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4
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682
Two link planar robot elbow errors in textbook (Inverse kinematics)
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3
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558
Poisson Probability Distribution Problem
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19
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12K
Find the value of ##k^2## in the problem involving trigonometry
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7
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1K
Prove that ## 4\tan^{-1}\left[\dfrac{1}{5}\right]- \tan^{-1}\left[\dfrac{1}{239}\right]= \dfrac{π}{4}##
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13
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775
Ratio of the sum of ##n## terms of two AP series
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9
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580
Decompose 4x4 determinant into 24 determinants -- How many are zero?
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1
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571
Solve ## 4x+51y=9: x=15+51t, y=-1-4t ##
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2
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Solve the equation: ##\tan x ⋅\tan 4x = 1##
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4
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862
Is My Proof That ab<a Correct Given 0<a<1 and 0<b<1?
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4
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607
Understanding Cubic Factorization: Solving for Roots with a and -2a
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6
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625
Identifying matrices as REF, RREF, or neither
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1
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805
Limit to Infinity of Quotient with Square Root - Reducing the Equation
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8
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627
Proving a trigonometric identity with ##\sin^4## s and ##\cos^4## s
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12
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750
Binomial Theorem - determine the term with...
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18
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1K
Roots of a polynomial mixed with a trigonometric function
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14
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859
Difference between -3² and (-3)² ?
2
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53
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3K
Matrices: if AB=A and BA=B, then B^2 is equal to?
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18
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2K
Are the following statements true? (1) a∈{{a},{a,b}} and (2) b∈{{a},{a,b}} true?
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8
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814
Find the smallest value of angle ##α + β ##
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11
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748
An inequality involving ##x## on both sides: ##\sqrt{x+2}\ge x##
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3
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1K
Solve the problem that involves ##\cos^{-1} x + \cos^{-1}y##
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3
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660
Solve the given problem involving: ##\tan^{-1} (2x+1)+ \tan^{-1} (2x-1)##
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10
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606
Solve the problem that involves diameter of the Bullseye
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2
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518
Partial Fraction Decomposition
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4
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831
Prove that the given inverse trigonometry equation is correct
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5
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597
Show that the ratio ##x+y:x-y## is increased by subtracting ##y##
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4
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686
I don't get a step with this quadratic question
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12
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717
Solve these simultaneous equations
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6
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617
Solve the given simultaneous equations
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8
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639
Is ##9\sqrt[3]{-3}## Equivalent to ##-9\sqrt[3]{3}##?
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4
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588
Solve for ##u## and ##v## in the given equations
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2
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457
Solve the given simultaneous equations in x^2, x and y
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1
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545
Solve the simultaneous equations involving x, y, and their squares
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2
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542
Simplifying (b-a)/(a-b): A Scientific Approach
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10
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718
Question about this technique for solving simultaneous equations
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4
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658
Number of ways to partition n persons and probability to form n groups
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10
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1K
Applications of algebraic expressions
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6
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613
Probability using combinations or alternatives
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12
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1K
How many positive integers x satisfy this logarithmic inequality?
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609
Basic probability question (1 boy + 2 girls of a group of 7)
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6
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798
Find the total number of ways of coloring the eight regions
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7
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927
Question about permutation formula -- How to use the formula when r = 0 ?
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6
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741
Discover Circle Theorem Help for Triangle PST: PSR Angle = 77 Degrees
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1
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545
Find the area of the quadrilateral OCBAO
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8
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606
Calculating Cable Turns for a Job
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1K
Solve the problem that involves iteration
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21
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1K
Solve the given problem involving functions: f(x)=|ax-b| and y=f(x)+c
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19
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937
Solve the given problem involving logarithms
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18
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1K
Prove this variation: If a+b ∝ a-b, prove that a^2+b^2 ∝ ab
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11
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957
Proving trig identities -- Is the method related to the unit circle?
2
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54
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Derivative of a piecewise function
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6
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560
Solving for a, b, and c in this equation for $ revenue for a circus
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4
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616
Solve the given problem that involves binomial theorem
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2
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603
Ideal Straight Line Fit for a Temperature Sensor Output
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2
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545
How Did 1886 Dutch Students Solve This Complex Math Problem?
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34
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Finding compound interest formula
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2
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659
Solve the given problem that involves Trigonometry
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7
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652
Find the possible values of angle ##∠ADB##
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2
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570
Determine the position vector of ##C##
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1
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512
Prove that these three ratios are equivalent
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11
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884
Adding square roots of ##i## leading to different answers!
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21
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802
How Did the Author Derive the Perfect Square from the Algebraic Equation?
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5
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783
Vector addition and subtraction
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13
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930
Calculating Radius & Water Depth of a Spherical Bowl
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7
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2K
Evaluating the angle theta using inverse sin
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4
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743
Finding the solution to system of 3 equations with 3 unknowns
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2
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560
Complex numbers confusion (how they got this expression in orange to become -1)
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25
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1K
Conceptual question on equations of the form ##x=ay^2+by+c##
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5
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723
Form a Linear Equation for the Value of this equipment during the 10 years it will be in use
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3
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2K
Is it possible to find a number x such that 5 < x < 1?
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26
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Precalculus Homework Help

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