David rents DVDS from a company that changes a $7.00 monthly fee and $1.50 for each dvd rental. He ends up paying $20.50 for the month of june. The equation 1.5 x + 7 = 20.5 represents this situation. Solve this equation for x type the NUMER in the text box please help me!

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

Reflect the point (7,0) across the y-axis

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.