Precalculus Mathematics Homework Help Forum

Post thread
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.
  • Sticky
Hey I posted in homework help but now it's gone
  • Mark44
  • · Replies 2 ·
Replies
2
  • Sticky
Homework Help Guidelines for Students and Helpers
  • vela
  • · Replies 0 ·
Replies
0
Prove that ## 4\tan^{-1}\left[\dfrac{1}{5}\right]- \tan^{-1}\left[\dfrac{1}{239}\right]= \dfrac{π}{4}##
  • chwala
  • · Replies 24 ·
Replies
24
Question about a proof of the converse of Thales' theorem
  • murshid_islam
  • · Replies 1 ·
Replies
1
"Critical" Triangle Problem
  • DanteKennedy
  • · Replies 10 ·
Replies
10
The optimal way of dividing the bet three ways
  • Hill
  • · Replies 23 ·
Replies
23
Hedging on a weather prediction
  • Hill
  • · Replies 11 ·
Replies
11
Solve the quadratic equation involving sum and product
  • chwala
  • · Replies 7 ·
Replies
7
Finding the number of ways to arrange identical balls in a circle (3 different colors)
  • songoku
  • · Replies 17 ·
Replies
17
Find the polar form of a complex number
  • trv
  • · Replies 5 ·
Replies
5
Greatest possible value of a constant in polynomial
  • songoku
  • · Replies 13 ·
Replies
13
Making the denominator of a certain fraction real
  • TensorCalculus
  • · Replies 5 ·
Replies
5
Family of lines that are at a distance of 5 from the origin
  • vcsharp2003
  • · Replies 14 ·
Replies
14
Probabilities on a spinner
  • TensorCalculus
  • · Replies 3 ·
Replies
3
Why Are There Two Possible Values of x in Similar Shapes Geometry Problems?
  • paulb203
  • · Replies 116 ·
4
Replies
116
Intersection of a circle and a sine curve
  • vcsharp2003
  • · Replies 26 ·
Replies
26
Calculating rate of fall of a sewer branch line
  • sevensages
  • · Replies 5 ·
Replies
5
[ASK] Trigonometric Inequality
  • Monoxdifly
  • · Replies 6 ·
Replies
6
What does this equation mean?
  • inuka00123
  • · Replies 12 ·
Replies
12
How much would you pay to play this fair coin flipping game?
  • docnet
  • · Replies 29 ·
Replies
29
Finding polar equation of a shifted cricle
  • farfromdaijoubu
  • · Replies 6 ·
Replies
6
Equality of sums of powers
  • littlemathquark
  • · Replies 47 ·
2
Replies
47
Came across this puzzle for an 8 year old
  • Natasha1
  • · Replies 32 ·
2
Replies
32
Eliminate ##\theta## between a pair of given equations
  • brotherbobby
  • · Replies 7 ·
Replies
7
Arithmetic Mean-Geometric Mean inequality question
  • YouAreAwesome
  • · Replies 4 ·
Replies
4
Find integer points on this equation
  • littlemathquark
  • · Replies 8 ·
Replies
8
Length of Diagonal
  • erobz
  • · Replies 45 ·
2
Replies
45
Solve the given problem involving probability without replacement
  • chwala
  • · Replies 10 ·
Replies
10
Solving a trigonometric equation with multiples of ##\tan##
  • brotherbobby
  • · Replies 7 ·
Replies
7
Find the Approximate Value of this Cube Root
  • littlemathquark
  • · Replies 6 ·
Replies
6
Approximate value of ##E=1/2! +1/3!+1/4!+... ##
  • littlemathquark
  • · Replies 12 ·
Replies
12
Vector addition and parallel vectors problem
  • jeff einstein
  • · Replies 6 ·
Replies
6
Understanding the graphical effect of f(x+a)
  • Aion96
  • · Replies 19 ·
Replies
19
Addition problem in Serge Lang Basic Mathematics
  • clone
  • · Replies 3 ·
Replies
3
Questions about proof of upper and lower bound theorem for polynomials
  • RChristenk
  • · Replies 11 ·
Replies
11
Question about an 8th grade math problem
  • murshid_islam
  • · Replies 20 ·
Replies
20
Regions with polygons
  • littlemathquark
  • · Replies 12 ·
Replies
12
Changing ##\tan\frac{x}{2}## to ##\cos x## for a proof
  • brotherbobby
  • · Replies 8 ·
Replies
8
##f(x+y) =f(x) f(y)## and ##f(1)+f(2)=5## then find ##f(-1)=?##
  • littlemathquark
  • · Replies 49 ·
2
Replies
49
If f(x-y). f(y)=f(x), f(5)=32, then what is f(7)?
  • littlemathquark
  • · Replies 14 ·
Replies
14
Why is ##h(x)=|x|## not a polynomial?
  • RChristenk
  • · Replies 12 ·
Replies
12
Solve the simultaneous equations
  • chwala
  • · Replies 20 ·
Replies
20
Solve the given problem involving vectors
  • chwala
  • · Replies 13 ·
Replies
13
Sides of a triangle
  • DaveC426913
  • · Replies 16 ·
Replies
16
Probability Word Problem: Aptitude Question
  • akhilnair
  • · Replies 8 ·
Replies
8
Can't solve this elementary school problem involving area of circles
  • shirozack
  • · Replies 23 ·
Replies
23
Solve for ##u## and ##v## in the given equations
  • chwala
  • · Replies 10 ·
Replies
10
Express the decimal number ##43## as a binary number
  • chwala
  • · Replies 13 ·
Replies
13
Solve ##\left| x+3 \right|= \left| 2x+1\right|##
  • RChristenk
  • · Replies 7 ·
Replies
7
Factoring difference of squares not working?
  • Marin12
  • · Replies 3 ·
Replies
3
How to Solve Mixed Number Multiplication in Fractions?
  • logicandtruth
  • · Replies 10 ·
Replies
10
Cubic equation solutions form
  • Hill
  • · Replies 2 ·
Replies
2
Use binomal theorem to evaluate ##(0.90)^{2.2}##
  • chwala
  • · Replies 8 ·
Replies
8
Logarithmic Regression Question (TI-84 Plus Graphing Calculator)
  • MeesaWorldWide
  • · Replies 4 ·
Replies
4
Probability problem confusion: 5 marbles placed randomly in 5 boxes
  • tellmesomething
  • · Replies 8 ·
Replies
8
Need Help Solving, Expanding, Rewriting, Graphing Logarithmic Functions
  • constant constant
  • · Replies 5 ·
Replies
5
Define a Dedekind cut and show the given set is(n't) a Dedekind cut
  • docnet
  • · Replies 1 ·
Replies
1
Which one is correct about hypothesis testing?
  • songoku
  • · Replies 11 ·
Replies
11
How to mathematically describe this weird set of points?
  • Lotto
  • · Replies 7 ·
Replies
7
Calculating the sum of a series of cubes
  • John3509
  • · Replies 14 ·
Replies
14
Probability Question: 3-Digit Combination Lock
  • MeesaWorldWide
  • · Replies 3 ·
Replies
3
Arithmetic mean and geometric mean
  • FISMAQUIM
  • · Replies 1 ·
Replies
1
Solving system of 3 quadratic equations
  • Gbl911
  • · Replies 4 ·
Replies
4
Solve the problem involving arithmetic progression
  • chwala
  • · Replies 10 ·
Replies
10
Solve the equation ##x^\frac{17}{6} + x^\frac{21}{25} =15##
  • chwala
  • · Replies 3 ·
Replies
3
Prove the identity of a triangle in the given problem
  • chwala
  • · Replies 2 ·
Replies
2
Solve the given equation that involves fractional exponent
  • chwala
  • · Replies 4 ·
Replies
4
Find the distance ##d## to a point in the given problem
  • chwala
  • · Replies 8 ·
Replies
8
Solve the given simultaneous equations
  • chwala
  • · Replies 5 ·
Replies
5
To find the boundedness of a given function
  • brotherbobby
  • · Replies 14 ·
Replies
14
Locus of all points -- Imprecise question?
  • paulb203
  • · Replies 12 ·
Replies
12
How to prove this without using Cardano's formula?
  • Math100
  • · Replies 8 ·
Replies
8
Are these values of the following correct? (Complex cube root of unity)
  • Math100
  • · Replies 9 ·
Replies
9
How to construct a periodic function ## f ## with period ## 4 ##?
  • Math100
  • · Replies 15 ·
Replies
15
Prove Fibonacci identity using mathematical induction
  • issacnewton
  • · Replies 4 ·
Replies
4
Confusion about ##\sqrt{x^2}= \left| x \right|##
  • RChristenk
  • · Replies 1 ·
Replies
1
Mathematical Induction with binomial sum
  • issacnewton
  • · Replies 9 ·
Replies
9
Circle equation coefficient conditions
  • RChristenk
  • · Replies 3 ·
Replies
3
Percentages on Variables: Find the number of students who took this exam
  • Merotzu
  • · Replies 9 ·
Replies
9
Solve ##x^{\frac{-1}{2}}-2x^{\frac{1}{2}}+x^{\frac{2}{3}}=0##
  • RChristenk
  • · Replies 24 ·
Replies
24
If p is even and q is odd, then ##\binom{p}{q}## is even
  • issacnewton
  • · Replies 19 ·
Replies
19
How Do You Solve the Inequality ##x^2<4## for Negative Values of ##x##?
  • RChristenk
  • · Replies 6 ·
Replies
6
Mathematical Induction Problem Fibonacci numbers
  • issacnewton
  • · Replies 11 ·
Replies
11
Find angle ADB in this isoceles triangle given some extra information
  • chwala
  • · Replies 4 ·
Replies
4
How to identify the type of function?
  • tellmesomething
  • · Replies 23 ·
Replies
23
Where Did I Go Wrong in Solving the Inequality?
  • RChristenk
  • · Replies 7 ·
Replies
7
How to Predict Outcomes of New Equations Without Solving for Variables?
  • Sucvicbil
  • · Replies 18 ·
Replies
18
Problem involving mathematical induction
  • issacnewton
  • · Replies 11 ·
Replies
11
Are Complex Solutions Overlooked When Solving \(16x^4 = 81\) Directly?
  • RChristenk
  • · Replies 5 ·
Replies
5
Prove that ##5 | (2^n a) \rightarrow (5 | a)##for any ##n##
  • issacnewton
  • · Replies 10 ·
Replies
10
How did they rewrite this polynomial in this way?
  • MiddleEast
  • · Replies 23 ·
Replies
23
How many positive integers x satisfy this logarithmic inequality?
  • Mr X
  • · Replies 3 ·
Replies
3
What Are the Two Factors of 15120 Given Their Sum and Difference?
  • RChristenk
  • · Replies 5 ·
Replies
5
Finding standard deviation of combination of data
  • songoku
  • · Replies 16 ·
Replies
16
Range of a function involving trigonometric functions
  • tellmesomething
  • · Replies 11 ·
Replies
11
Equation of hyperbola confocal with ellipse having same principal axes
  • Aurelius120
  • · Replies 4 ·
Replies
4
Find the possible values for ##a## and ##b## where ##a## and ##b## are integers
  • chwala
  • · Replies 3 ·
Replies
3
Find the magnitude and the direction of the resultant vector
  • chwala
  • · Replies 8 ·
Replies
8
Find the range of the function ##f(x) = \frac{e^{2x}-e^x+1} {e^{2x}+e^x+1}##
  • tellmesomething
  • · Replies 8 ·
Replies
8
The value of (b - c) / (c - a)
  • songoku
  • · Replies 11 ·
Replies
11
Solve the given problem giving your answer as a single logarithm
  • chwala
  • · Replies 12 ·
Replies
12
Prove the identity matrix is unique
  • askmathquestions
  • · Replies 69 ·
3
Replies
69