What is the first 5 common multiples of 7 and 20

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

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?

The bottom of a slide at the playground is 6 feet from the base of the play set. the length of the slide is 10 feet. how tall is the slide. 11.66 feet 10 feet 6 feet 8 feet