Precalculus Mathematics Homework Help Forum

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.

Threads

Simplifying $\frac{a}{2^a}$ - Limit to 3/4?

  • nobahar
  • · Replies 21 ·
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21

How Many Rational Zeros Does the Polynomial f(x) = x³ + 4x² - 4x - 16 Have?

  • Greywolfe1982
  • · Replies 10 ·
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10

Weight at altitude using rational function formula

  • gamefreak
  • · Replies 4 ·
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4

Four-digit ATM pin with no repeated digits allowed

  • skullers_ab
  • · Replies 5 ·
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5

How to Express c in Terms of b in Quadratic Equations?

  • um0123
  • · Replies 19 ·
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19

How many ways can I go up some steps?

  • Paulo Serrano
  • · Replies 3 ·
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3

Can we prove B is guilty from these five logical premises?

  • TheFurryGoat
  • · Replies 1 ·
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1

How do you tell if tan x=0.5371, is in radian or degree?

  • Nope
  • · Replies 6 ·
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6

What is the value of the missing area in a standard deviation problem?

  • bap902
  • · Replies 2 ·
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2

Linear algebra normalising a vector?

  • Chadlee88
  • · Replies 3 ·
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3

Prove inequality with cyclic sums and nth roots

  • Kryna
  • · Replies 6 ·
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6

Trigonometric Identities for Sine and Cosine

  • abstrakt!
  • · Replies 2 ·
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2

Trig Identity: Verify a*sin Bx + b*cos Bx = sqrt(a^2 + b^2)sin(Bx + C)

  • morr485
  • · Replies 2 ·
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2

Finding domain where n[X]up = [nX]up with ceiling function

  • Mafiaboy
  • · Replies 7 ·
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7
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6

Newton's Law of Cooling of coffee

  • ajr246
  • · Replies 2 ·
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2

How can I improve my graph for N = e1.386t?

  • r-soy
  • · Replies 6 ·
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6

How to Find the Base in an Equations with Unknown Numbers

  • maxfails
  • · Replies 2 ·
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2

Converting point-slope form to standard form with fraction coefficients

  • iamsmooth
  • · Replies 2 ·
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2

Mappings, domains, codomains, proof of linearity

  • Mysteek
  • · Replies 10 ·
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10

Trig question eq in the form y = sin k x

  • Matt1234
  • · Replies 2 ·
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2

Why 3x3 Matrices Don't Form a Vector Space Over Reals

  • neergmas
  • · Replies 7 ·
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7

The only 3 consecutive odd numbers that are primes are 3,5,7

  • CmbkG
  • · Replies 1 ·
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1

Algebra question - quick visual

  • vorcil
  • · Replies 3 ·
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3

Unit circle problems (ive wikied and googled)

  • ndmp
  • · Replies 5 ·
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5

Coefficient of p4q7 in (2p-q)(p+q)10

  • look416
  • · Replies 13 ·
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13

Trignometry Rules/properties/common equations?

  • Master7731
  • · Replies 4 ·
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4

Solving the Cosine Identity: cos(α-β)cos(α+β) = cos2α - sin2 β

  • phys1618
  • · Replies 2 ·
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2

Focus of a Parabola Q6ciii: Australian HSC Mathematics Extension 2 Exam

  • Mentallic
  • · Replies 4 ·
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4

What are the steps to simplify a trig identity with multiple angles?

  • phys1618
  • · Replies 1 ·
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1

Simple Linear Algebra Problem: Calvin and Wendy's Screw Purchase Dilemma

  • schmolch
  • · Replies 1 ·
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1

Divisibility problem with prime numbers

  • Detektyw
  • · Replies 8 ·
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8

Trig questions. Which ones are true.

  • shiri
  • · Replies 3 ·
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3

Area, volume and depth relation?

  • HelloMotto
  • · Replies 3 ·
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3

Joint pdf of Z=X-Y and W=X+Y with independent uniform variables

  • aruna1
  • · Replies 14 ·
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14

How Can the Unit Circle Prove the Cosine Half-Angle Formula?

  • Louis B
  • · Replies 1 ·
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1

Finding eigenvalues and eigenvectors of a 3×3 matrix

  • geft
  • · Replies 4 ·
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4

How does the type of music affect heart rate?

  • katanne92813
  • · Replies 2 ·
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2

Calculating The Mean, Standard Error, and Standard Error of the Mean

  • Gogsey
  • · Replies 1 ·
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1

Probability distribution functon

  • aruna1
  • · Replies 2 ·
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2

Find two numbers with sum 13 that minimize sum of squares

  • Monocerotis
  • · Replies 7 ·
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7

Finding a when (A+I)(A-I)=I and (A^101)^-1=2aA

  • yoleven
  • · Replies 11 ·
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11

Deriving the Equation for an Ellipse from Parametrization

  • ehrenfest
  • · Replies 8 ·
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8

What Is the Probability of Rolling At Least Two 6's in 13 Dice Rolls?

  • bap902
  • · Replies 6 ·
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6

Why use subscript notation for age in population models

  • hominid
  • · Replies 3 ·
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3
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16

Evaluating Logarithms: Solving 2^x - 2^{1-x} = 1 in Simple Steps

  • Matty R
  • · Replies 3 ·
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3

How Do You Simplify This Complex Absolute Value Expression?

  • FlufferNuterFSU
  • · Replies 1 ·
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1

Proving sin(2x + π/3) = sin(2x) + sin(2(x+π/3))

  • iamthegelo
  • · Replies 2 ·
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2

Classifying conic sections from Ax² + Bx + Cy² + Dy + E = 0

  • Sven
  • · Replies 5 ·
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5

Inequalities and absolute value

  • highcontrast
  • · Replies 10 ·
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10

Proving lim(x→∞) (x² − ⌊x²⌋)/x = 0 with squeeze theorem

  • Kindayr
  • · Replies 7 ·
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7

Get Help with Questions: Explaining Solutions

  • r-soy
  • · Replies 2 ·
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2

Sin -270 different from sin - 90 exact and aprox values?

  • Senjai
  • · Replies 2 ·
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2

Decomposing a function as sum of even and odd parts

  • pyrosilver
  • · Replies 19 ·
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19

Solving a Quadratic Equation Problem

  • mcsun
  • · Replies 5 ·
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5

Quadratic Solution Simplification: Is My Work Correct?

  • montoyas7940
  • · Replies 3 ·
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3

Real life application of trignometry identities

  • Arshad_Physic
  • · Replies 1 ·
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1
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2

Finding perpendicular bisector.

  • charlie_luna
  • · Replies 3 ·
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3

Linear independence of three 2×2 matrices

  • Noxide
  • · Replies 2 ·
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2

Find Inverse of f(x) = x+2e(x)

  • chrisparr
  • · Replies 1 ·
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1

How to properly find the Domain of fog/gof ?

  • Spiffy
  • · Replies 4 ·
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4

Intersection of probabilities.

  • tjera
  • · Replies 6 ·
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6

Simplifying a sequence with powers of 2 and increasing even numbers

  • nobahar
  • · Replies 9 ·
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9

Newtons cooling law problem given in precalc

  • pezgoon
  • · Replies 8 ·
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8

How can I effectively solve two challenging differential equations problems?

  • FaradayLaws
  • · Replies 1 ·
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1

Finding a basis for the set of all rank-n matrices

  • xuej1112
  • · Replies 4 ·
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4

Point and Circle intersection in 3 D

  • Adee
  • · Replies 2 ·
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2

Probability involving a deck of cards

  • karthikphenom
  • · Replies 1 ·
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1

Finding the Arctangent of an Unknown Number

  • xXOfNiRXx
  • · Replies 2 ·
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2

Check Limit at Infinity of f(x)

  • Zhalfirin88
  • · Replies 3 ·
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3

How to Find the Resultant Velocity of a Plane with a Wind?

  • shizupple
  • · Replies 3 ·
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3

How to Use Negative Exponents on a Scientific Calculator

  • krimsondane
  • · Replies 5 ·
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5

Expected Number of Girls Born in a Hospital on a Given Day

  • Stef42
  • · Replies 10 ·
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10

How do you solve this equation (involving exponentials)?

  • xllx
  • · Replies 6 ·
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6

How many times will you bring drinks to a home game in a 20 game season?

  • shawonna23
  • · Replies 2 ·
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2

Solve Ratio Word Problem: Add 1.6667 lbs Barley to Mixture

  • LearningMath
  • · Replies 5 ·
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5

Bouncing ball distance and tree growth with geometric series

  • Suy
  • · Replies 8 ·
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8

Yes, you are getting the correct answers for a) and b).

  • shiri
  • · Replies 2 ·
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2

Finding the (4,4) cofactor of a 4x4 matrix

  • shiri
  • · Replies 12 ·
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12

Find Location of Aeroplane After 60km Travel

  • vorcil
  • · Replies 4 ·
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4

How to Prove the Sine Rule Using Cross Product?

  • iasc
  • · Replies 2 ·
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2

Projectile Motion(Fun. Fun) where object is thrown from ground level

  • guesswho9
  • · Replies 4 ·
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4
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5

Conditional probability for a point in a unit square

  • SusanCher89
  • · Replies 4 ·
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4

Linear Equations for Gold Course Holes

  • vorcil
  • · Replies 3 ·
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3

Solving x^4 - x^3 + x - 1 = 0 How is this done?

  • sdoman
  • · Replies 4 ·
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4

Finding log something, in terms of A and B.

  • Suy
  • · Replies 6 ·
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6

Trig Problem: Angular Velocity.

  • Senjai
  • · Replies 2 ·
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2

When do triangle and tympani players play together?

  • shawonna23
  • · Replies 9 ·
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9

Simplifying logarithmic expressions

  • fatima_a
  • · Replies 2 ·
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2

Finding The Equidistant of 2 Points

  • Ecom
  • · Replies 5 ·
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5

Number of onto functions from B to B where B = {1,2,3,4,5}

  • James889
  • · Replies 3 ·
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3

Equation of Circle: Centre (2,-4), y-intercept 1

  • veronika_bebs
  • · Replies 3 ·
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3

Solve Inverse Trig Function: tan^-1(sinθ/(cosθ-1)) = 90° + θ/2

  • Saladsamurai
  • · Replies 3 ·
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3

When does a senator first campaign during a presidential election year?

  • shawonna23
  • · Replies 4 ·
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4

When will Margo, Roberto and Randa's activities align again?

  • shawonna23
  • · Replies 6 ·
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6

If battery acid is 1/5 as acidic, what is its pH?

  • Suy
  • · Replies 7 ·
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7

Cauchy-Schwartz Inequality for Step Functions

  • kidsmoker
  • · Replies 5 ·
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5