question 14

Short Answer

$$\text { If } z = x ^ { 2 } - x y + 7 y ^ { 2 } \text { and } ( x , y ) \text { changes from } ( 2,1 ) \text { to } ( 1.85,1.05 ) \text { find } d z \text {. }$$

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Definitions:

Passage Of Title

The transfer of ownership rights from the seller to the buyer in a transaction.

Insurable Interest

A stake or financial interest in an item or person that allows the owner to purchase insurance against risks.

Pressure Washer

A mechanical device that uses high-pressure water spray to clean surfaces, removing dirt, grime, and other materials.

Commercial Rents

Payments made for the use of commercial property, such as offices, shops, or industrial spaces.