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May 29, 2015

Posts by Quidditch


Total # Posts: 508

Math
Use the second equation to express one variable in terms of the other variable. Substitute that into the first expression. Expand and combine the terms. Solve by inspection of the quadratic forumula.
October 2, 2007

Math
Look for ways to express given values. If there are two things you are trying to find out, try to express one of them in terms of the other. Solve the equation of one variable, then use the relationship to find the other variable. Let x = number in back of you. Let y = number ...
October 2, 2007

calculus
for the expression y =2 ^ (-t/4), the inverse function is the function which t = f(y). If we solve the above function for t in terms of y: taking the log of both sides log(y) = log(2 ^ (-t/4)) log(y) = (-t/4)*log(2) (log(y))/(log(2))=-t/4 -4*(log(y))/(log(2))=t
October 2, 2007

Middle School Algerbra
Separate y into x pieces. y/x would represent this.
October 2, 2007

math
Recall that a prime number can not be divided evenly by any number except itself and 1. The first several primes are 2, 3, and 5. try 2 180/2 = 90 180/2 = 45 45 is not evenly divisible by 2. try 3 45/3 = 15 15/3 = 5 5 is a prime. So now the prime factorization is: 5 * 3 * 3 * ...
October 2, 2007

math...help please!
The 100th term will be: 100 * m + b m = 4 and b = ? The 100th term is 402
October 2, 2007

math...help please!
Take a guess that the answer is a line. Use any to points where the term number is x and the term value is y. Sove for the slope and intercept. Terms 2 and 4 would give: m * 2 + b = 10 m * 4 + b = 18 m = (18 - 10) / (4 - 2) = 8 / 2 = 4 If m = 4, what is b? (just substitute)
October 2, 2007

Math
You probably mean: =0, not +0 Factoring, (a+12) (a-6)=0 two values for a will give 0 so...?
October 2, 2007

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