(15 points! ) each year a car lost 20% of its value at the beginning of the year. after how many whole years was it worth less than half of its original value?explain how you got the answer too : )

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2