R, S, Q and P are the midpoints of OC, CB, BA and OA respectively. OR = a, CS = b and OP = c.
Show that RS is parallel to PQ
Note: Ignore arrows above vectors eg write RS, not RS
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The total amount that Patrick needs to pay for the shoes including the tax is equal to sum of price, s and the tax, 0.06s. Mathematically, this can be expressed as,
                                 total price = s + 0.06s
Simplifying the equation,
                              total price = 1.06 s
Therefore, Patrick can multiply the price of the shoes, s by 1.06.