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6.2 proportions                                  January 04, 2012




        Solve.                       Simplify.

        1. 4x = 52                   3. 36/48


        2. 7k = 21                   4. 6/10




                                      Bellwork
                  Objective: solve and use proportions




HW pg. 296 #18­40 even, 55, 56                                      1
6.2 proportions                                                      January 04, 2012




        Proportion ­ an equality of two rations ­ for example, 6       8 . 
                                                                  =
                                                               9      12

        If two proportions are equal, we can cross multiply.




HW pg. 296 #18­40 even, 55, 56                                                          2
6.2 proportions                  January 04, 2012




       Solve x = 4 .
             9 6




HW pg. 296 #18­40 even, 55, 56                      3
6.2 proportions                  January 04, 2012




       Solve 4 =  t .
             5 55




HW pg. 296 #18­40 even, 55, 56                      4
6.2 proportions                                                     January 04, 2012




      Do the ratios   4   and 10 form a proportion?  Explain.  
                              
                      6       14




        Do the ratios
                        6 and  4   form a proportion?  Explain.  
                        9  6




HW pg. 296 #18­40 even, 55, 56                                                         5
6.2 proportions                                                      January 04, 2012




    One hundred nautical miles equals about 115 standard, or statute, miles.  
    To the nearest mile, how far in statute miles is 156 nautical miles?




HW pg. 296 #18­40 even, 55, 56                                                          6
6.2 proportions                        January 04, 2012




                       HW pg 296 
                      # 18­40 even, 
                         55 + 56




HW pg. 296 #18­40 even, 55, 56                            7

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6.2 notes

  • 1. 6.2 proportions January 04, 2012 Solve. Simplify. 1. 4x = 52 3. 36/48 2. 7k = 21 4. 6/10 Bellwork Objective: solve and use proportions HW pg. 296 #18­40 even, 55, 56 1
  • 2. 6.2 proportions January 04, 2012 Proportion ­ an equality of two rations ­ for example, 6       8 .  = 9      12 If two proportions are equal, we can cross multiply. HW pg. 296 #18­40 even, 55, 56 2
  • 3. 6.2 proportions January 04, 2012 Solve x = 4 . 9 6 HW pg. 296 #18­40 even, 55, 56 3
  • 4. 6.2 proportions January 04, 2012 Solve 4 =  t . 5 55 HW pg. 296 #18­40 even, 55, 56 4
  • 5. 6.2 proportions January 04, 2012 Do the ratios 4 and 10 form a proportion?  Explain.     6  14 Do the ratios 6 and  4 form a proportion?  Explain.   9  6 HW pg. 296 #18­40 even, 55, 56 5
  • 6. 6.2 proportions January 04, 2012 One hundred nautical miles equals about 115 standard, or statute, miles.   To the nearest mile, how far in statute miles is 156 nautical miles? HW pg. 296 #18­40 even, 55, 56 6
  • 7. 6.2 proportions January 04, 2012 HW pg 296  # 18­40 even,  55 + 56 HW pg. 296 #18­40 even, 55, 56 7