Think of it this way, there are 12 in 1 foot so 6•12=72 and 72 divided by 8 equals 9
-3 x -4 = 12
Because the negatives cancel each other out
Therefore leaving you with 3 x 4 and that equals 12
2(x+y)=24
2x=y
Use substitution. If y=2x, than we can substitute 2x for it in the other equation, because x and y equal the same things in both equations.
So using that we get 2(x+2x)=24
SIMPLIFY
2(3x)=24
DISTRIBUTE
6x=24.
DIVIDE: x=4.
If we substitute x into the original equations we get x=4 and y=8. Those are your two numbers.
Have a nice day! :)
Hello,
We are going to used the theorem of Thalès.
||v||=√(3²+(-2)²)=√13
k*√13=10==>k=10/√13
w=k.v=10/√13<3,-2>