Section ATHS FC – Math Department Al Ain Assignment 1 (Term I)-‐Grade 9 Regular Date Name Lesson ID Marks 1.1 ,1.4,1.5.1.6 /5 WRITE LEGIBLE. PENCIL ONLY . SHOW ALL WORK. SHOW ALL WORK FOR CREDIT 1-‐1 Variables and expressions 1).Sophie’s math class has 6 fewer boys than girls, and there are g girls. Write an expression for the number of boys. 1-‐4 Solving two step and Multi step equations 2) Kate is saving to take an SAT prep course that costs $350. So far, she has saved $180, and she adds $17 to her savings each week. How many more weeks must she save to be able to afford the course? 1-‐5 Solving for Variables on both sides Solve the following equations . Check your work 3) 2y + 3 = 3(y + 7) (4) 4n + 6 − 2n = 2(n + 3) 5) 6m − 8 = 2 + 9m − 1 (6) −v + 5 + 6v = 1 + 5v + 3 ATHS-‐ALAin, FC/Math Grade 9 Regular Page 1 7 Janine has job offers at two companies. One company offers a starting salary of $28,000 with a raise of $3000 each year. The other company offers a starting salary of $36,000 with a raise of $2000 each year. a. After how many years would Janine’s salary be the same with both companies? b. What would that salary be? 1-‐6 Solving for a variable Solve for the variable indicated 8) 4c = d for c ( 9) n − 6m = 8 for n 10) 2p + 5r = q for p ( 11) −10 = xy + z for x 12) The formula c = 5p + 215 relates c, the total cost in dollars of hosting a birthday party at a skating rink, to p, the number of people attending. a. Solve the formula c = 5p + 215 for p. b . If Allie’s parents are willing to spend $300 for a party, how many people can attend? ATHS-‐ALAin, FC/Math Grade 9 Regular Page 2 ATHS-‐ALAin, FC/Math Grade 9 Regular Page 3