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.
Conditional probability problem
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Solving an inequality involving absolute values
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Solve the given permutation problem
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Find the highest power of ## 3 ## dividing ## 823 ##
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Proving that the inverse of a rational number exists
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Prove the trigonometry identity and hence solve given problem
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Set properties of even (##E##) and odd (##I##) integers
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Find the length of PA - deductive Geometry
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Help simplifying this algebraic expression please
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Prove that ## li(x)\sim \frac{x}{\log x} ##.
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Determine the day of the week on which you were born
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Graph Sin(2x+6): Is Parent Function the Best Option?
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Find the constants ## A ## and ## B ##
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Using this Libre Calc statement: =if(B4=50,100)
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3
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Prove that ## \sum_{n\leq x}\frac{\phi(n)}{\sqrt{n}}=Cx^{3/2}+.... ##.
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Solving an equality with absolute values
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How to find the constant B in here?
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Prove that the altitudes of a triangle are concurrent
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Use Euler's summation formula to prove the following....
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Verify this result when ## n=10 ##
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Apply trigonometric methods in solving problems
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Checking My Understanding of the Naive Bayes Theorem
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Solving trigonometry equation involving half-angle
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Prove that ## \sum_{d\mid n} f(d)=\sum_{d\mid n} f(\frac{n}{d}) ##.
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Why does the dot product in this solution equal zero?
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How to find out the sin value from cos
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Every S-composite can be expressed as a product of S-primes
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13
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How can we prove the bac-cab rule using a geometrical derivation?
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Prove that ## \sum_{d\mid n}\sigma_{1}(d)\sigma_{1}(\frac{n}{d}) ##
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Prove by the principle of induction
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Where is the mistake in my probability calculation for a 20cm string cut?
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2
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Problem set with 5 proofs involving odd, even, parity, etc.
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Determine all integers ## n ##
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Precise definition of tangent line to a curve
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18
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Is the following true, for each positive integer ## k ##?
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Use the Euclidean algorithm to find integers ## a, b, c ##
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MHB True or False Question about Square Matrices
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Prove that ## 4\mid \sigma_{1}(4k+3) ##
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Determine (with proof) the set of all prime numbers
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3
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Determine all integers ## n ## for which ## \phi(n)=16 ##
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Prove that ## n ## must be a power of ## 2 ##
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Find the values of a real number ##a## for an inequality to hold
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Prove that ## 1^{p-1}+2^{p-1}+3^{p-1}+\dotsb +(p-1)^{p-1}\equiv -1 ##.
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Establish that ## a\equiv b\pmod {p} ##
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Prove that ## 1835^{1910}+1986^{2061}\equiv 0\pmod {7} ##
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Rationalizing this fraction involving square roots
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Probability of selecting two white balls from two bags
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Verify that ## x\equiv a^{p-2}b\pmod {p} ## is a solution
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Solve the given trigonometry equation
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Prove that ## a^{3}+1 ## is divisible by ## 7 ##.
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Probability that A will win given a condition
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Verify that ## a^{5} ## and ## a ## have the same units digit
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Show that ## 60 ## divides ## a^{4}+59 ##
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Find the units digit of ## 3^{100} ## by the use of Fermat's theorem
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Derive ## a^{7}\equiv a\pmod {42} ## for all ## a ##
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Pattern of variables with absolute value exponents
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Derive the following congruence....
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Show that ## 168=3\cdot 7\cdot 8 ## divides ## a^{6}-1 ##
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Deduce that ## 13\mid (11^{12n+6}+1) ##
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Show that ## 133\mid (a^{18}-b^{18}) ##.
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Show that ## a^{12}\equiv 1\pmod {35} ##.
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How do I manually stack photos for an equal average using given opacity levels?
2
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Verify that ## 17 ## divides ## 11^{104}+1 ##
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Can we use criss-cross approach with complex number equations?
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Understanding cot2(theta) = A-C / B
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Obtain the two incongruent solutions modulo 210 of the system
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Find the solutions of ## 7x+3y\equiv 6\pmod {11} ##.
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Can this system of inequalities be solved for x?
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Find the solutions of the following system of congruences
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Obtain the eight incongruent solutions of the linear congruence
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Find the solutions of the system of congruences
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How to find all solutions of ## 3x-7y\equiv 11\pmod {13} ##?
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Is 2i + j + 3k the Normal Vector of Plane CDPQ?
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5
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Find an integer having the remainders ## 2, 3, 4, 5 ##.
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Finding Integer with Chinese Remainder Theorem
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Prove that ## x\equiv 1\pmod {2n} ##
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Prove that the congruences admit a simultaneous solution
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Is this question doable? Finding triangle side length
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What was the least number of coins that could have been stolen?
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Using 5C2 to calculate number of ways to get 2 heads in 5 coin tosses
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Calculating Modulo for -3 and 26: Understanding the Remainder Calculation
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Find the smallest number of eggs
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Expected Value of Election Results
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How to obtain three consecutive integers?
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Solve ##x\equiv 5\pmod{11},x\equiv 14\pmod{29},x\equiv 15\pmod{31}##
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Solve ##x\equiv 1\pmod {3},x\equiv 2\pmod {5},x\equiv 3\pmod 7 ##
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Solve the following linear system
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Solve ## 6x\equiv 15\pmod {21} ##.
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Solve ## 25x\equiv 15\pmod {29} ##.
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Show that ## 11\mid R_{n} ## if and only if ## n ## is even
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3
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Determine whether each of the ISBNs below is correct
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Determine the value of the obscured digit
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Obtain the check digits in this problem
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Why Do Some Projects Fail Despite Best Efforts?
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Find the missing digits in this problem about an invoice
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Prove that ## 13 ## divides ## 10^{2p}-10^{p}+1 ##
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Finding a solution to the Diophantine equation 6x + 10y + 45z =1
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Show that ## 9\mid R_{n} ## if and only if ## 9\mid n ##
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2
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Factor the repunit ## R_{6}=111111 ## into a product of primes
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3
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Proof: Palindromes Divisible by 11
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