1. ## vectors

1. find a single vector equal to the following

a) $-3(4,-9)-9(2,3)$
b) $\frac{-1}{2}(6,-2)+\frac{2}{3}(6,15)$

2. given $\vec{x} = 2\vec{i}-\vec{j} and \vec{y}=\vec{-i}+5\vec{j}$ find a vector equivalent to each of the following

a) $3\vec{x}-\vec{y}$
b) $2(\vec{x}+3\vec{y})-3(\vec{y}+5\vec{x})$

2. Originally Posted by william
1. find a single vector equal to the following

a) $-3(4,-9)-9(2,3)$
b) $\frac{-1}{2}(6,-2)+\frac{2}{3}(6,15)$

2. given $\vec{x} = 2\vec{i}-\vec{j} and \vec{y}=\vec{-i}+5\vec{j}$ find a vector equivalent to each of the following

a) $3\vec{x}-\vec{y}$
b) $2(\vec{x}+3\vec{y})-3(\vec{y}+5\vec{x})$
Do you understand that these involve nothing more than integer arithmetic?

3. Originally Posted by HallsofIvy
Do you understand that these involve nothing more than integer arithmetic?