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.
Rounding Errors to nearest 10cm
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Solve the given inequality Q. 21
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2
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577
Question about the property of PDF
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8
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849
Show that these equations are linearly dependent using Mathematica
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6
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675
Quantitative reasoning problem
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5
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612
Find the sum of the coefficients of ##(x+y)^{16}##
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5
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579
Why is ##^{2m}C_m## equivalent to ##\dfrac{2m!}{m!m!}##?
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6
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698
Help please with De Moivre's Theorem (raising a complex number to a power)
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16
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1K
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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676
Find the smallest integer ## a>2 ## such that ## 2\mid a ##
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3
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948
Optimizing Null Space Solutions: How to Remove Zeros in Rank Deficient Matrices
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10
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638
Complex mapping z ↦ ω = (z − a)/(z − b)
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5
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563
Partial Permutation, Combination question for buying dogs at the pet store
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19
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839
How can we fairly distribute food among four people with different appetites?
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27
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634
What is a point of using complex numbers here?
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3
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537
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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681
Combination, partial permutation
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1
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458
Drawing marked balls from an urn
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10
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820
Basic counting methods — integers between 1 and 100 that are divisible by 7
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19
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976
Inequalities With negative numbers and switching x -- therefore switching the sign
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8
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507
S=u*t+a*t^2/2 VS ratio 1:2:3:5... t1/t10= ...
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8
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848
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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654
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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669
Two link planar robot elbow errors in textbook (Inverse kinematics)
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3
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544
Poisson Probability Distribution Problem
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19
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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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759
Ratio of the sum of ##n## terms of two AP series
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9
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564
Decompose 4x4 determinant into 24 determinants -- How many are zero?
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1
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556
Solve ## 4x+51y=9: x=15+51t, y=-1-4t ##
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2
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1K
Solve the equation: ##\tan x ⋅\tan 4x = 1##
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4
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848
Is My Proof That ab<a Correct Given 0<a<1 and 0<b<1?
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4
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594
Understanding Cubic Factorization: Solving for Roots with a and -2a
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6
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611
Identifying matrices as REF, RREF, or neither
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1
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773
Limit to Infinity of Quotient with Square Root - Reducing the Equation
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8
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610
Proving a trigonometric identity with ##\sin^4## s and ##\cos^4## s
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12
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737
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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844
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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802
Find the smallest value of angle ##α + β ##
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11
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730
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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645
Solve the given problem involving: ##\tan^{-1} (2x+1)+ \tan^{-1} (2x-1)##
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10
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597
Solve the problem that involves diameter of the Bullseye
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2
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512
Partial Fraction Decomposition
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4
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818
Prove that the given inverse trigonometry equation is correct
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5
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590
Show that the ratio ##x+y:x-y## is increased by subtracting ##y##
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4
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673
I don't get a step with this quadratic question
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12
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703
Solve these simultaneous equations
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6
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604
Solve the given simultaneous equations
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8
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632
Is ##9\sqrt[3]{-3}## Equivalent to ##-9\sqrt[3]{3}##?
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4
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585
Solve for ##u## and ##v## in the given equations
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2
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444
Solve the given simultaneous equations in x^2, x and y
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1
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526
Solve the simultaneous equations involving x, y, and their squares
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2
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535
Simplifying (b-a)/(a-b): A Scientific Approach
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10
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712
Question about this technique for solving simultaneous equations
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4
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643
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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603
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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593
Basic probability question (1 boy + 2 girls of a group of 7)
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6
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788
Find the total number of ways of coloring the eight regions
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7
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917
Question about permutation formula -- How to use the formula when r = 0 ?
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6
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728
Discover Circle Theorem Help for Triangle PST: PSR Angle = 77 Degrees
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1
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533
Find the area of the quadrilateral OCBAO
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8
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599
Calculating Cable Turns for a Job
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5
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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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922
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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940
Proving trig identities -- Is the method related to the unit circle?
2
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54
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2K
Derivative of a piecewise function
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6
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554
Solving for a, b, and c in this equation for $ revenue for a circus
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4
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602
Solve the given problem that involves binomial theorem
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2
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590
Ideal Straight Line Fit for a Temperature Sensor Output
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2
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528
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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651
Solve the given problem that involves Trigonometry
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7
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633
Find the possible values of angle ##∠ADB##
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2
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556
Determine the position vector of ##C##
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1
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508
Prove that these three ratios are equivalent
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11
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871
Adding square roots of ##i## leading to different answers!
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21
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787
How Did the Author Derive the Perfect Square from the Algebraic Equation?
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5
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761
Vector addition and subtraction
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13
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915
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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730
Finding the solution to system of 3 equations with 3 unknowns
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2
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552
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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706
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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1K
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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892
Chance of Selecting Twins from Group of 30 [Solved!]
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24
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1K
Plotting points in three-dimensional space
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8
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903

Precalculus Homework Help

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