Which shows a perfect square trinomial?

50y2 – 4x2
100 – 36x2y2
16x2 + 24xy + 9y2
49x2 – 70

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year