What transformation is represented by the rule (x, y) —>(-x, y)?

Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip.gasoline costs $1.05 per gallon.what was the cost of gasoline per mile driver?

Pls! does anybody know a shortcut for answering these types of questions in the future?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.