The diagonals of a trapezold are perpendicular.
O never
O always
sometimes

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.

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

How is this equation completed? i cannot find any examples in the book.