tailieunhanh - Geomegy review 5

Tham khảo tài liệu 'geomegy review 5', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ------------------------------------ PROBLEM SOLVING ------------------------------------------- IẬ- X 60 2 X 60 11 120 V -120 11 Thus it will take Ms. Walpole and Mr. Saum -yy minutes to plant two shrubs. Special Symbols Problems Some SAT questions invent an operation symbol that you won t recognize. Don t let these symbols confuse you. These questions simply require you to make a substitution based on information the question provides. Be sure to pay attention to the placement of the variables and operations being performed. Example Given p q p X q 4 2 find the value of 2 3. Fill in the formula with 2 replacing p and 3 replacing q. p X q 4 2 2 X 3 4 2 6 4 2 10 2 100 So 2 3 100. Example x 8 If y z y z y z y z then what is the value of4 2 y z Fill in the variables according to the placement of the numbers in the triangular figure 8 y 4 and z 2. 8 4 2 8 8 4 2 8 4 2 14 14 8 4 14 2 LCD is 8. 14 28 8 8 56 8 Add. 98 8 Simplify. 49 4 49 4 Answer 164 -------------------------------------- PROBLEM SOLVING --------------------------------------------- Practice Question The operation c Q d is defined by c Q d dc d X dc _ d. What value of d makes 2 Q d equal to 81 a. 2 b. 3 c. 9 d. e. Answer b. If c Q d dc d X dc _ d then 2 Q d d2 d X d2 - d. Solve for d when 2 Q d 81 d2 d X d2 _ d 81 d 2 d 2 - d 81 d2 2 d - d 81 d4 81 Vd4 V8Ĩ d2 9 d2 V9 d 3 Therefore d 3 when 2 Q d 81. The Counting Principle Some questions ask you to determine the number of outcomes possible in a given situation involving different choices. For example let s say a school is creating a new school logo. Students have to vote on one color for the background and one color for the school name. They have six colors to choose from for the background and eight colors to choose from for the school name. How many possible combinations of colors are possible The quickest method for finding the answer is to use the counting principle. Simply multiply the number of possibilities from the first category six .