Parker High School's homecoming dance tickets cost $12 for seniors and $15 for everyone else. A total of 165 students attended the dance, and the school collected $2160. How many seniors attended the dance?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Nicole is making carrot bread she needs 5 cups of carrots for 2 cups of sugar. what is the ratio of cups of sugar to cups of carrots that nicole will need? write the ration in three different ways

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?