Choose the correct operation to be performed.

                                         Proportions                            Name:
Solve the following proportions.



        3   ????                                 ????   16                                 ????+4   10
   1.     =                             2.      =                               3.       =
        5 25                                  7   28                                  6    12
        x = 15                          x=4                                      x=1



        2????−5   3                              11   13                                5????   3????−3
   4.        =                          5.       =                              6.      =
        ????+10   4                               ????   19                                35    49
                                               209            1                          3
        x = 10                          x=      13
                                                     or 16   13
                                                                                  x=−    4
                                                                                             or
-0.75
                                            or 16.08



   7. Shawn bought a 24-pack of soda for $7.20. How much does each soda cost?
       $0.30 per can


For the following problems below, tell which column contains the better buy. If the rates
are the same, write the word ‘proportional’ on the line.
                         Column A                             Column B

Column B            20 pounds of potatoes for $12.50              50 pounds of potatoes for $30.00


Column A            84 oz. of detergent for $10.64                48 oz. of detergent for $6.19


Proportional        Four bananas for $1.20                        12 bananas for $3.60


Column B            Two tickets for $1.80                         6 tickets for $5.00


Column B            1 month of cell service for $45               1 year of cell service for $510


                                         Proportions                            Name:
Solve the following proportions.



        3   ????                                 ????   16                                 ????+4   10
   1.     =                             2.      =                               3.       =
        5 25                                  7   28