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.
Prove the identity matrix is unique
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Show that (a-b) + (c-d) = -(b+d) - (-a-c)
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6
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765
Master Factorization with Step-by-Step Guide for x^4 - 3x^2 - 4
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19
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1K
What is the formula for finding the nth partial sum?
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15
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965
Solve the given simultaneous equations that involves hyperbolas
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4
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743
Question about vector coordinates
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4
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800
Calculate the position vector for 3di
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1
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832
Inequality involving a reciprocal - where's the mistake?
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12
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1K
Solve the simultaneous linear congruences
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4
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941
Find the remainder when ## 823^{823} ## is divided by ## 11 ##
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14
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1K
Solving an inequality involving absolute values
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11
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1K
Conditional probability problem
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15
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990
Solve the given permutation problem
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1
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820
Prove that ##AE=2BC## -Deductive Geometry
2
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52
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2K
Calculate angle AEC and ADC
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8
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1K
Find the length of PA - deductive Geometry
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1
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623
Prove the trigonometry identity and hence solve given problem
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5
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983
Set properties of even (##E##) and odd (##I##) integers
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5
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792
Help simplifying this algebraic expression please
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4
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781
Prove that ## li(x)\sim \frac{x}{\log x} ##.
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3
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915
Find the constants ## A ## and ## B ##
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1
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829
Graph Sin(2x+6): Is Parent Function the Best Option?
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6
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938
Proving that the inverse of a rational number exists
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8
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1K
Using this Libre Calc statement: =if(B4=50,100)
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3
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754
Prove that ## \sum_{n\leq x}\frac{\phi(n)}{\sqrt{n}}=Cx^{3/2}+.... ##.
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4
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976
How to find the constant B in here?
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7
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952
Solving an equality with absolute values
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10
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943
Prove that the altitudes of a triangle are concurrent
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3
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1K
Use Euler's summation formula to prove the following....
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17
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1K
Determine the day of the week on which you were born
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18
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1K
Find the highest power of ## 3 ## dividing ## 823 ##
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9
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Verify this result when ## n=10 ##
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8
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744
Checking My Understanding of the Naive Bayes Theorem
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1
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943
Prove that ## \sum_{d\mid n} f(d)=\sum_{d\mid n} f(\frac{n}{d}) ##.
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5
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793
Why does the dot product in this solution equal zero?
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3
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769
Apply trigonometric methods in solving problems
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1
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825
How to find out the sin value from cos
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9
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1K
Every S-composite can be expressed as a product of S-primes
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13
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1K
Find the probability that the shorter piece of a 20cm string is at least 8cm when the string is cut randomly
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2
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840
Problem set with 5 proofs involving odd, even, parity, etc.
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4
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819
Prove that ## \sum_{d\mid n}\sigma_{1}(d)\sigma_{1}(\frac{n}{d}) ##
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20
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Determine all integers ## n ##
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10
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809
Is the following true, for each positive integer ## k ##?
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19
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758
Prove by the principle of induction
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14
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983
Precise definition of tangent line to a curve
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18
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1K
Use the Euclidean algorithm to find integers ## a, b, c ##
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5
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840
Solving trigonometry equation involving half-angle
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42
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2K
Prove that ## 4\mid \sigma_{1}(4k+3) ##
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5
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872
Determine (with proof) the set of all prime numbers
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3
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945
Determine all integers ## n ## for which ## \phi(n)=16 ##
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14
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1K
Prove that ## n ## must be a power of ## 2 ##
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15
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970
Find the values of a real number ##a## for an inequality to hold
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7
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889
Prove that ## 1^{p-1}+2^{p-1}+3^{p-1}+\dotsb +(p-1)^{p-1}\equiv -1 ##.
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1
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1K
Establish that ## a\equiv b\pmod {p} ##
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8
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807
Rationalizing this fraction involving square roots
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3
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818
Probability of selecting two white balls from two bags
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2
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1K
Verify that ## x\equiv a^{p-2}b\pmod {p} ## is a solution
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6
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870
Solve the given trigonometry equation
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1
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699
Prove that ## 1835^{1910}+1986^{2061}\equiv 0\pmod {7} ##
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19
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1K
Prove that ## a^{3}+1 ## is divisible by ## 7 ##.
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1
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807
Probability that A will win given a condition
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15
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928
Verify that ## a^{5} ## and ## a ## have the same units digit
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1
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1K
Show that ## 60 ## divides ## a^{4}+59 ##
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2
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820
Find the units digit of ## 3^{100} ## by the use of Fermat's theorem
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1
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983
Derive ## a^{7}\equiv a\pmod {42} ## for all ## a ##
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6
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1K
Derive the following congruence....
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3
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720
Show that ## 168=3\cdot 7\cdot 8 ## divides ## a^{6}-1 ##
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4
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863
Deduce that ## 13\mid (11^{12n+6}+1) ##
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2
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629
Pattern of variables with absolute value exponents
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6
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881
Show that ## 133\mid (a^{18}-b^{18}) ##.
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3
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720
Show that ## a^{12}\equiv 1\pmod {35} ##.
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1
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875
Verify that ## 17 ## divides ## 11^{104}+1 ##
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5
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984
Can we use criss-cross approach with complex number equations?
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9
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823
Obtain the two incongruent solutions modulo 210 of the system
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7
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2K
Find the solutions of ## 7x+3y\equiv 6\pmod {11} ##.
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2
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883
Can this system of inequalities be solved for x?
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5
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756
Find the solutions of the following system of congruences
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2
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803
Obtain the eight incongruent solutions of the linear congruence
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2
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920
Find the solutions of the system of congruences
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1
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849
How to find all solutions of ## 3x-7y\equiv 11\pmod {13} ##?
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6
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1K
Find an integer having the remainders ## 1, 2, 5, 5 ##
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7
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1K
Is 2i + j + 3k the Normal Vector of Plane CDPQ?
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5
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906
Find an integer having the remainders ## 2, 3, 4, 5 ##.
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2
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802
Finding Integer with Chinese Remainder Theorem
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3
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850
Prove that ## x\equiv 1\pmod {2n} ##
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2
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762
Prove that the congruences admit a simultaneous solution
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5
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930
What was the least number of coins that could have been stolen?
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3
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2K
Is this question doable? Finding triangle side length
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27
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1K
Using 5C2 to calculate number of ways to get 2 heads in 5 coin tosses
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4
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1K
Find the smallest number of eggs
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1
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1K
Calculating Modulo for -3 and 26: Understanding the Remainder Calculation
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22
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Expected Value of Election Results
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7
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803
How to obtain three consecutive integers?
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3
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Find the smallest integer ## a>2 ## such that ## 2\mid a ##
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3
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929
Solve ##x\equiv 5\pmod{11},x\equiv 14\pmod{29},x\equiv 15\pmod{31}##
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3
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2K
Solve ##x\equiv 1\pmod {3},x\equiv 2\pmod {5},x\equiv 3\pmod 7 ##
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1
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890
How do I manually stack photos for an equal average using given opacity levels?
2
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46
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2K
Solve ## 4x+51y=9: x=15+51t, y=-1-4t ##
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2
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1K
Solve ## 6x\equiv 15\pmod {21} ##.
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7
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990
Solve ## 25x\equiv 15\pmod {29} ##.
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1
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822

Precalculus Homework Help

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