8. Vectors

If vector $v⃗=12î-2ĵ$ and vector $u⃗=5î+20ĵ$ calculate $2v ⃗-2u ⃗$ using $î$ and $ĵ$ notation.

If vector $v ⃗=$ $11ĵ$ and vector $u⃗=$ $10î-25ĵ$ calculate $v⃗+\(\frac\)15u⃗$ using $î$ & $ĵ$ notation.

Find the unit vector in the direction of $a⃗=6î+3ĵ$.

Find the unit vector in the direction of $v⃗=12î-35ĵ$.

If vector $a⃗=20î$ and vector $b⃗=50ĵ$ calculate $a ⃗-b ⃗$ using $î$ and $ĵ$ notation.