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.
Query about how the domain of a binomial coefficient was calculated
  • Snowman2
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Very silly question on whether the domain of ##log_{10}(x²)## = ##2log_{10}(x)##
  • tellmesomething
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Equation that is defined as an identity
  • RChristenk
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Correct statement related to common tangents of circles
  • songoku
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6
discussion about grade calculator
  • tayyaba
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Simultaneous equation involving cos, sin
  • atky1224
  • · Replies 12 ·
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Find the values of a and b to get max/min of certain expression
  • songoku
  • · Replies 21 ·
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Find ##\tan \theta ## in the form of ##a+b\sqrt {2}##
  • chwala
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Find the sides of the right triangle so that their sum is minimized
  • MatinSAR
  • · Replies 32 ·
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Find area of the shaded part in the given diagram
  • chwala
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Rationalize the denominator: ##\sqrt{\dfrac{1}{2x^3y^5}}##
  • RChristenk
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Express ##x^3+y^3## in terms of ##m## and ##n##
  • brotherbobby
  • · Replies 17 ·
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How long is the longest piece of the given Rope?
  • chwala
  • · Replies 24 ·
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Is this a simultaneous equation question?
  • paulb203
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Is Triangle Formed by Centroids of Equilateral Triangles Equilateral?
  • Hill
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Number of Miles In One Light Year
  • felizgu
  • · Replies 11 ·
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How Far Can A Person See?
  • felizgu
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Three points on the Complex plane
  • Hill
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6
Solve the equation : ##x^4+12x^3+2x^2+25=0##
  • chwala
  • · Replies 24 ·
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Find suitable value of Median and Range for given box-whisker plot
  • chwala
  • · Replies 6 ·
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6
NHST statistics for % of students late to class
  • tomwilliam
  • · Replies 15 ·
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15
Designing reflector straight line lamp
  • Harry Logtenberg
  • · Replies 3 ·
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Condition for coplanarity of two lines
  • Aurelius120
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How do I find the circumference and Area of this figure?
  • arhzz
  • · Replies 24 ·
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Find the position vector of ##Q##
  • chwala
  • · Replies 4 ·
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4
Factorise a six-termed quadratic in ##a## and ##x##
  • brotherbobby
  • · Replies 15 ·
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Solve the given word problem: Selecting 2 numbers from a watch face
  • chwala
  • · Replies 4 ·
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Conjugate vs Complex Conjugate
  • rstor
  • · Replies 9 ·
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Solve the given inequality
  • chwala
  • · Replies 5 ·
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Solve ##\dfrac{3x-6}{5-x}+\dfrac{11-2x}{10-4x}=3\dfrac{1}{2}##
  • RChristenk
  • · Replies 3 ·
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3
Equal intercept on the three axes
  • arham_jain_hsr
  • · Replies 6 ·
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6
A combinatorial probability question
  • tstl
  • · Replies 18 ·
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18
Work out the amount that Arjun paid in rent in 2019
  • chwala
  • · Replies 6 ·
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6
Solve ##\sqrt{\dfrac{x}{y}}+\sqrt{\dfrac{y}{x}}=4\dfrac{1}{4} \cdots##
  • RChristenk
  • · Replies 10 ·
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10
Why Is My Argument Calculation for Complex Number Incorrect?
  • MatinSAR
  • · Replies 14 ·
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14
Approximation used in physics explanation
  • tellmesomething
  • · Replies 8 ·
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8
Does the Modified Collatz Conjecture Always End in 1, 5, or 17?
  • Dries vanlandschoot
  • · Replies 10 ·
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Why Does Solving y+3=3√(y+7) Yield Extraneous Solutions?
  • RChristenk
  • · Replies 8 ·
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Where does the mark scheme get these numbers from?
  • TheePhysicsStudent
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Show that if ##x>1##, ##\log_e\sqrt{x^2-1}=\log_ex-\dfrac{1}{2x^2}-##
  • RChristenk
  • · Replies 8 ·
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8
Combinatorics for number of distinct terms in multinomial expansion
  • zxen
  • · Replies 2 ·
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Logarithmic Series question for finding ##\log_e2##
  • RChristenk
  • · Replies 10 ·
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Finding the domain (and range) of a logarithmic function
  • brotherbobby
  • · Replies 11 ·
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Find the ##r^{th}## term of ##(a+2x)^n##
  • RChristenk
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Solve for all angles x: cos(2x) + cos(x) = 0, where 0<x<2pi
  • Ascendant0
  • · Replies 25 ·
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Find the sum of the coefficients in the expansion ##(1+x)^n##
  • RChristenk
  • · Replies 5 ·
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Solve using complete the square vs. quadratic formula
  • paulb203
  • · Replies 11 ·
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Show that ##^{n+1}C_r=^nC_r+^nC_{r-1}##
  • RChristenk
  • · Replies 14 ·
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Solve the problem involving the cubic function
  • chwala
  • · Replies 12 ·
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12
In how many ways can 5 prizes be given away to 4 boys?
  • RChristenk
  • · Replies 16 ·
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Figuring out Natural Deduction problem but can't find mistake
  • krob
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How do I fix this surd inside a surd?
  • lioric
  • · Replies 3 ·
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Distributing negative signs in logarithms
  • RChristenk
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Solve the given trigonometry equation
  • chwala
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[Statistics] Calculate the percentage
  • LokLe
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Find the value of ##\sqrt[5]{0.00000165}##
  • RChristenk
  • · Replies 4 ·
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Factorize a number in a different base
  • RChristenk
  • · Replies 1 ·
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Calculate the magnitude of driving force on the car
  • chwala
  • · Replies 15 ·
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15
In what base is 647 the square of 25?
  • RChristenk
  • · Replies 4 ·
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Calculate acceleration and speed of block
  • chwala
  • · Replies 3 ·
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Calculate the value of ##θ## and ##X##
  • chwala
  • · Replies 6 ·
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Basic Simultaneous Equations Problem
  • paulb203
  • · Replies 9 ·
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State the domain and range for a given function
  • brotherbobby
  • · Replies 7 ·
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How long does it take the car to move 30 m from rest?
  • chwala
  • · Replies 7 ·
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Work out an estimate for the total number of ponies in the forest
  • paulb203
  • · Replies 28 ·
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Find the time taken by the truck to move 1 metre
  • chwala
  • · Replies 3 ·
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3
Combinations with identical and unidentical objects
  • tellmesomething
  • · Replies 16 ·
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Number of ways of arranging 7 characters in 7 spaces
  • Aurelius120
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What Are the Values of A, B, and C for the Given Expression?
  • chwala
  • · Replies 19 ·
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Factor an equation second order in ##x,y## with other variables
  • brotherbobby
  • · Replies 14 ·
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Solve the given problem involving logarithms
  • chwala
  • · Replies 5 ·
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Given value of vectors a,b, b.c and a+(b×c), Find (c.a)
  • Aurelius120
  • · Replies 5 ·
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Why Does Expanding (13-8)^99 Not Yield the Same Remainder as 5^99 Modulo 13?
  • tellmesomething
  • · Replies 7 ·
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7
A,B,C are 3 points with position vectors a,b,c Find length of median
  • Aurelius120
  • · Replies 18 ·
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Find an irrational number that satisfies the given inequality
  • chwala
  • · Replies 22 ·
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22
To find the range of a given ##\sin## function
  • brotherbobby
  • · Replies 15 ·
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Find the roots of the given cubic equation
  • chwala
  • · Replies 13 ·
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Why is 3 = a x (1)^2 x (-3)^2 in this step of the solution?
  • TheePhysicsStudent
  • · Replies 3 ·
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How to find the range of a function with square roots?
  • arham_jain_hsr
  • · Replies 23 ·
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Solve the given problem involving conditional probability
  • chwala
  • · Replies 32 ·
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Coin problem - all possible amounts from a set of coins
  • musicgold
  • · Replies 7 ·
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7
Solving Number Triangle Puzzle with Trial and Error
  • musicgold
  • · Replies 21 ·
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Complete the parametric equation for the line where the planes cross
  • MP97
  • · Replies 7 ·
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Find the domain and the range of ##f-3g##
  • chwala
  • · Replies 3 ·
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3
What Is the Correct Angle Between Vectors a and c?
  • nafisanazlee
  • · Replies 4 ·
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Multi-event probability puzzle - is my answer correct?
  • musicgold
  • · Replies 7 ·
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Finding a Mistake: Probability of Y with X and Spins
  • songoku
  • · Replies 7 ·
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7
Struggling with a geometry puzzle - area of garden path
  • musicgold
  • · Replies 11 ·
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Converting number base of decimals
  • RChristenk
  • · Replies 11 ·
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Find ##b-a## which satisfies following limit
  • MatinSAR
  • · Replies 12 ·
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12
What is ##7 \times 7## in base ##7##?
  • RChristenk
  • · Replies 13 ·
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1st year high school geometry proof
  • Iamconfused123
  • · Replies 14 ·
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14
To find the component of a vector perpendicular to another
  • brotherbobby
  • · Replies 20 ·
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20
LCM question -- how many packages of burgers and cheese slices to buy?
  • paulb203
  • · Replies 13 ·
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Finding the direction of infinite limits
  • Weightlifting
  • · Replies 10 ·
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Efficient Logarithmic Calculations for 0.3048 without a Calculator
  • RChristenk
  • · Replies 8 ·
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Find the relation between 2 variables
  • Debdut
  • · Replies 7 ·
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Finding coincident angle between 2 equally spaced sets
  • Telosian 7
  • · Replies 1 ·
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Changing the subject of a formula
  • paulb203
  • · Replies 16 ·
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16
Find the value of ##a, b## and ##k## in the problem involving graphs
  • chwala
  • · Replies 6 ·
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