"Change of Base Formula. A formula that allows you to rewrite a logarithm in terms of logs written with another base. This is especially helpful when using a calculator to evaluate a log to any base other than 10 or e. Assume that x, a, and b are all positive"
Example: Logb x = Loga x/Loga b Pick a new base and the formula says it is equal to the log of the number in the new base divided by the log of theE old base in the new base.
Solution: Change tobase 10 and use your calculator. Now use your calculator and round to hundredths.
By addition method, it is the same thing as elimination, which is what it is officially called.
So we can mulitply the bottom equation by 2 so that we can then cancle out the "x's" later on
Now we have the two equations
4x-y=3 , 4x+6y=38
We can then subtract these two equations to cancel out the "x"
So now we have figured out our y value is 7, and we can substitute it into our equation to get our "x" value now.
x=5/2 or 2.5