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.
Inequalities With negative numbers and switching x -- therefore switching the sign
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8
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488
S=u*t+a*t^2/2 VS ratio 1:2:3:5... t1/t10= ...
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8
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802
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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619
Probability related to cumulative distribution function
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4
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632
Basic counting methods — integers between 1 and 100 that are divisible by 7
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19
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935
Find the value of ##k^2## in the problem involving trigonometry
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7
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995
Two link planar robot elbow errors in textbook (Inverse kinematics)
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3
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515
Ratio of the sum of ##n## terms of two AP series
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9
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537
Decompose 4x4 determinant into 24 determinants -- How many are zero?
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1
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507
Identifying matrices as REF, RREF, or neither
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1
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718
Prove 0<a<1, 0<b<1, then ab<a
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4
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549
Understanding Cubic Factorization: Solving for Roots with a and -2a
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6
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581
Limit to Infinity of Quotient with Square Root - Reducing the Equation
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8
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566
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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730
Solve the equation: ##\tan x ⋅\tan 4x = 1##
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4
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810
Proving a trigonometric identity with ##\sin^4## s and ##\cos^4## s
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12
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693
Find the roots of the given cubic equation
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13
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836
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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801
Difference between -3² and (-3)² ?
2
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53
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2K
Solve the given problem involving: ##\tan^{-1} (2x+1)+ \tan^{-1} (2x-1)##
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10
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568
Solve the problem that involves ##\cos^{-1} x + \cos^{-1}y##
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3
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613
Find the smallest value of angle ##α + β ##
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11
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693
Solve the problem that involves diameter of the Bullseye
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2
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487
Partial Fraction Decomposition
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4
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785
Prove that the given inverse trigonometry equation is correct
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5
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564
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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775
I don't get a step with this quadratic question
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12
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681
Negative sign in cube root
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4
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559
Solve the given simultaneous equations
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8
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617
Solve these simultaneous equations
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6
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578
Solve the simultaneous equations involving x, y, and their squares
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2
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497
Solve the given simultaneous equations in x^2, x and y
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1
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494
Solve for ##u## and ##v## in the given equations
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2
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423
Solve the simultaneous equations
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7
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1K
Question about this technique for solving simultaneous equations
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4
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601
Show that the ratio ##x+y:x-y## is increased by subtracting ##y##
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4
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647
Simplifying (b-a)/(a-b): A Scientific Approach
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10
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695
Applications of algebraic expressions
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6
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589
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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2
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558
Number of ways to partition n persons and probability to form n groups
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10
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1K
Basic probability question (1 boy + 2 girls of a group of 7)
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6
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767
Discover Circle Theorem Help for Triangle PST: PSR Angle = 77 Degrees
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1
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498
Find the total number of ways of coloring the eight regions
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7
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896
Find the area of the quadrilateral OCBAO
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8
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563
Calculating Cable Turns for a Job
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5
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1K
Question about permutation formula -- How to use the formula when r = 0 ?
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6
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694
Derivative of a piecewise function
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6
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532
Prove this variation: If a+b ∝ a-b, prove that a^2+b^2 ∝ ab
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11
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899
Ideal Straight Line Fit for a Temperature Sensor Output
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2
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494
Solving for a, b, and c in this equation for $ revenue for a circus
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4
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577
Rounding Errors to nearest 10cm
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26
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2K
Finding compound interest formula
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2
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624
Help please with De Moivre's Theorem (raising a complex number to a power)
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16
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1K
Solve the given problem involving logarithms
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18
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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 that involves binomial theorem
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2
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560
Solve the given problem that involves Trigonometry
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7
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600
Solve the given problem involving functions: f(x)=|ax-b| and y=f(x)+c
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19
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865
Determine the position vector of ##C##
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1
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496
Find the possible values of angle ##∠ADB##
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2
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525
Stumped by the algebraic steps in this equation
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5
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722
Prove that these three ratios are equivalent
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11
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846
Adding square roots of ##i## leading to different answers!
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21
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755
Vector addition and subtraction
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13
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881
Finding the solution to system of 3 equations with 3 unknowns
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2
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535
Evaluating the angle theta using inverse sin
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4
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706
Complex numbers confusion (how they got this expression in orange to become -1)
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25
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1K
Baffled by old school exam
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34
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2K
Conceptual question on equations of the form ##x=ay^2+by+c##
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5
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672
Is it possible to find a number x such that 5 < x < 1?
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26
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998
If 1=5, 2=25, 3=125,4=1880, 5=?
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8
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2K
Number of lines equidistant from four points on a plane
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2
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865
Chance of Selecting Twins from Group of 30 [Solved!]
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24
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993
Plotting points in three-dimensional space
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8
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877
Trying to understand the property of absolute value inequality
2
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38
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2K
"Calculating Korifice Value in Cranes TP 410M, Problem 7-12
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6
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1K
Is it ok to assume matrices A and B as identity matrix?
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25
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887
Using inverses to solve systems of equations
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4
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548
Proving inverse of a 2 x 2 matrix is really an inverse
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3
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699
Help with inverse matrix's
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3
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777
Solving Equations: Does Squaring Make False True?
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20
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748
Transformations to both sides of a matrix equation
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25
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969
Problems in manipulating these 4 radical equations
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8
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766
Is there a rule that states that I should not divide in this scenario?
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10
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599
Deriving algebraic definition of cross product
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12
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813
Gauss-Jordan Elimination algorithm steps
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1
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466
Solve 2 Triangle Problem: Calculate Exact Value of x
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7
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1K
Free variables for a matrix in REF
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3
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1K
Finding vectors parallel to a given vector
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5
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971
Identifying the type of expression
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3
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436
Finding the value of lambda so that two lines are parallel
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6
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870
Exploring the Math of Glucose Polymers: Understanding 6^n
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6
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652
Interchanging x and y for inverse function
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13
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2K
Cannot understand what ##(mod ~ \pi)## means in the given formula
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7
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611
Is ##f(x)=2^{x}-1## considered an exponential function?
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12
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1K
3x3 matrix with complex numbers
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18
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1K
Inequality question -- Need help getting started...
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7
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604

Precalculus Homework Help

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