Solve the following addition problems. remember to carry as necessary. a. 995 lb. 6 oz. + 1,004 lb. 11 oz.  b. 24 t. 1,507 lb. 12 oz. + 7 t. 938 lb. 6 oz. c. 6 t. 14 oz. + 11 t. 1,949 lb. + 8 oz. + 5 t. 49 lb. 15 oz.

a.   995 lb. 6 oz.

+  1,004 lb. 11 oz.

  1999 lb  17 oz  =  2000 lb 1 oz.

16 oz = 1 lb

Therefore,  

1999 lb  17 oz = 1999 lb + 16 oz + 1 oz = 1999 lb + 1 lb + 1 oz

b. 24 T 1,507 lb 12 oz.

   + 7 T 938  lb  6 oz.

      31 T  2445 lb  18 oz

2000 lb = 1 T.

16 oz = 1 lb

Therefore,

31 T  2445 lb  18 oz = 31 T + 2000 lb + 445 lb + 16 oz + 2 oz

                                 = 31 T + 1 T + 445 lb + 1 lb + 2 oz

c.     6 T.                 14 oz.  

   +  11 T. 1,949 lb.

   +                          8 oz.

   +   5 T. 49 lb.      15 oz.

     22T.  1998 lb.   37 oz.

     22T.  1998 lb.   37 oz. = 22 T + 1998 lb + 16oz + 16 oz + 5 oz.

                                          = 22 T + 1998 lb + 1 lb + 1 lb + 5 oz.

                                          = 22 T + 2000 lb + 5oz

                                           = 22 T + 1 T + 5 oz.

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.