Two Customers took out car loans from a bank. Marcus took out a 5-year loan for $10,000 and paid 4.7% annual simple interest.

Gianna took out a 6-year loan for $10,000 and paid 4.5% annual simple interest.

What is the difference between the amounts of interest Marcus and Gianna paid for their car loans?
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Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Write as a product: ac^2–ad+c^3–cd–bc^2+bd