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.
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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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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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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Factor the repunit ## R_{6}=111111 ## into a product of primes
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Proof: Palindromes Divisible by 11
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Prove that ## 7, 11 ##, and ## 13 ## all divide ## N ##
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Verify that ## N-M ## is divisible by ## 9 ##
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Determine whether the integer ## 1010908899 ## is divisible by....
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Proof That 6 Divides Any Integer N
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Solve the given simultaneous equation
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Minimum Length of Cuts for Unfolding Box Into Flat Sheet?
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If ##x> 1## and ##x^2 <2##, prove ##x < y##, ##y^2<2##
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Linearity and non-linearity in addition and multiplication
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Supply Equation: Y=mx+c or S=d*Qty+c, Why P Instead of Qty?
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Can this be solved without trial and error?
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Huge Multi Part Prob + Stats question from past paper
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Show that ## 2^{n} ## divides an integer ## N ##.
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Which formula do I use? (Megastats Excel Statistics homework problem)
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Find the values of ## n\geq 1 ## for which ## 1+2+3+\dotsb +n ##.
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Solving for ##x## for a given inequality
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Prove that there exists a prime with at least ## n ## of its digits.
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Show that ## t_{n+2k}\equiv t_{n}\pmod {k} ##.
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Determine the last three digits of the number ## 7^{999} ##
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No integer whose digits add up to ## 15 ## can be a square or a cube
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Obtain the digits ## x ## and ## y ##
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Solve for ##x## involving modulus
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Triangle Math Help: Calculate Angles & Lengths with 46 & 35 Measurements
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Find the remainder when ## 4444^{4444} ## is divided by ## 9 ##.
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Show that ## a^{2}-a+7 ## ends in one of the digits ## 3, 7 ,9##
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Divisibility of Integers ## 176521221 ## & ## 149235678 ## by 9 & 11
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Proof: Divisibility of Integers by 4
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Proof: Integer Divisibility by 3 via Polynomials
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Proof That an Integer is Divisible by 2
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Finding constant related to random variable
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Sailing along multiple Bearings Problem
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If f(x)=(e^x+e^-x)/2, what is the inverse function?
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Clarification on Proof by Contradiction
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Probability of getting the smallest value of cards
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Solve the problem that involves a sector of a circle
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Find the translation and stretch from ##y=2^x## to ##y=2^{x+4}##
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Possible values an expression can take : ##\dfrac{x^2-x-6}{x-3}##
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Show the proof involving multiples of numbers
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Find the missing digits in the calculation below
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Application of N choose K, unsure of what is happening
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Find the missing digits in the calculations below
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Is the integer ## (447836)_{9} ## divisible by ## 3 ## and ## 8 ##?
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Expected value of median of rolling three fair dice
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Find the last two digits of the number ## 9^{9^{9}} ##.
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The units digit of a triangular number iw ## 0, 1, 3, 5, 6 ##?
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Any one of the integers ## 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ## can occur?
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For any integer ## a ##, the units digit of ## a^{2} ## is?
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Simplifying the Argument of a Complex Number
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Use the binary exponentiation algorithm to compute....
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All the possible posts in PF, all the possible human thoughts
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Proving that an Integer lies between x and y using Set Theory
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Prove that ## b\equiv c\pmod {n} ##, where the integer is....
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Prove that whenever ## ab\equiv cd\pmod {n} ## and....
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Prove that ## 89\mid (2^{44}-1) ## and ## 97\mid (2^{48}-1) ##
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Prove that ## a^{({2}^{n})}\equiv 1\pmod {2^{n+2}} ## for any ##n##?
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Give an example to show that ## a^{k}\equiv b^{k}\pmod {n} ## ....
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Prove that the integers ## c, c+a, c+2a, c+3a, ...., c+(n-1)a ## ....
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Why is b^2 = 4 for this ellipse?
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How many cards can be taken at most while satisfying a certain rule?
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Prove that ## aa_{1}, aa_{2}, ...., aa_{n} ## is also a complete set?
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Show that ## {2n \choose n}\equiv 0\pmod {p} ##?
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Prove: If the integer ## a ## is not divisible by ## 2 ## or ## 3 ##....
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Finding area of a non right angled triangle
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Surface area of a sphere ##= \pi * (a^2+b^2+c^2+d^2)##
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Prove that ## a^{4}\equiv 0 ## or ## 1\pmod {5} ##?
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Prove that ## a^{3}\equiv 0, 1 ##, or ## 6\pmod {7} ##?
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