Solve each system using elimination. Each system only has one solution. Write your solution in the form (x, y). 2x+3y=-42x+3y=−4

-2x-5y=8−2x−5y=8

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

(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.