Hey y’all, could you please help me answer these 2 questions. I would also like the working out please~ Thanks

Brent wants to know what is 5 x 1/2

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?