What is the average rate of change for this quadratic function for the interval from x=2 to x= 4

Asequence of numbers begins with 12 and progresses geometrically. each number is the previous number divided by 2. which value can be used as the common ratio in an explicit formula that represents the sequence? 1/2 2 6 12

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.