Recent content by SnipedYou

Here is a general way to solve things like this 1. 2^{x-1}-2^{x} = 2^{-3} Now factor out a 2^{x-1} 2^{x-1}(1 - 2) = 2^{3} \rightarrow 2^{x - 1} = -\frac{1}{8} You can take the logarithm at this point or you could notice that -\frac{1}{8} is out of the range of 2^{x} Similar approach 2...

Check your arithmetic -17 + 2 \ne -19 Then when you get a quadratic apply the quadratic formula.

Well because of the Isosceles triangle theorem B and C are congruent. Well also know that the new two angles you created with line with line AF will also be congruent. Since the 2 angles and angle A add up to 180 as well as all the angles in the triangle you can see that angle B will be...

Personally I think it is easier and quicker to synthetically divide then to waste my time plugging it into a calculator. If you don't know what synthetic division is, you can read about it at the bottom of this page. http://www.purplemath.com/modules/remaindr.htm

Yes because the law of negative exponents states: a^{-1} = \frac{1}{a}

Ok so now we will have x = loonies y = toonies x + y=38 and x + 2y = 55 Then let's solve for either x or y (I'll do it for x) x = 38 - y Then we'll substitute: 38 - y + 2y = 55 Simplify: y=17 Now substitute into the our equation: x + 17 = 38 and we find that x = 21

Does the problem also give you the value of the coins? Here let me give you a sample problem here: Let's say I have a total of 1 dollar. Let's say I have a total of 15 coins in both nickel and dimes. Well I'll let my nickels be my x's and my dimes be my y's. Now we get the equations: x + y =...

Well you could do it like this: \frac{15.3}{3.05} = \frac{9.8}{x} I just rounded everything off and found that x = 1.95

Divide until you get a quadratic. Try inputing easy numbers like -1,0,1 into the equation and if it equals 0 then it is a factor. In this quartic (x+1) ends up being a factor twice (I got a different answer from the book.) So that means that -1 is a factor. Then use Synthetic Division (Which in...

Well seeing that they are good logicians then maybe they could determine their own eye color based on the color of the tribes and through their families eyes. The new information the anthropologist told them was that he had a family. Here's one riddle I especially like...its better said than...