The price of a 7​-minute phone call is ​$1.05. What is the price of a 15​-minute phone​ call? The price of a 15- minute phone call is $
plz help me O_O

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Which of the choices shown could be used to prove that aacp=abcp ?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).