<PRE><B>Question 1109721</B>
Assumption is that vectors u, v, w start at the origin(0,0)
:
Looks like the problem is asking for the dot product, a · b = ax × bx + ay × by
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a) 3u = 3&lt;2,2&gt; = &lt;6,6&gt;
3u · v = &lt;6,6&gt; · &lt;-3,4&gt; = -18 + 12 = -6 
:
b) 2v = 2&lt;-3,4&gt; = &lt;-6,8&gt;
u · 2v = &lt;2,2&gt; · &lt;-6,8&gt; = -12 + 16 = 4
4w = 4&lt;1,-2&gt; = &lt;4,-8&gt;
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