Salut ajutatima si pe mine la urmatoarele exercitii

(2012x2011-2011x2010x1x2009)
2,15-3,5+47: 2
va rog mult ajutatima am nevoie !
multumesc mult : )

What is the percent of increase for a population that changed from 438,000 to 561,000

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250

(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.