# Posts by Quidditch

Total # Posts: 512

**geometry**

Correct, so A is false.

**geometry**

If you have the three points of a triangle, could you draw one line through them all?

**Math**

Here, no quadratics required, luckily. solving the second equation for y in terms of x y = (3/4) * x substituting into the first equation x^2 + y^2 = 25 yields x^2 + ( (3/4) * x)^2 = 25 x^2 + (9/16)*(x^2)=25 combining terms (25/16) * (x^2)= 25 x^2 = 25 * (16/25) x^2 = 16 x...

**Math**

Oops! I meant to say: Solve by inspection OR the quadratic forumla.

**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.

**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 ...

**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

**Middle School Algerbra**

Separate y into x pieces. y/x would represent this.

**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 * ...

**math...help please!**

The 100th term will be: 100 * m + b m = 4 and b = ? The 100th term is 402

**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)

**Math**

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