Docstoc

2 1

Document Sample
2 1 Powered By Docstoc
					   Objective - To translate variable expressions.
                                          
    add         subtract   multiply      divide
    plus         minus       times      quotient
    sum        difference   product
increased by decreased by …of...
    total    diminished by twice  2 
                  less
  more than    less than
 added to   subtracted from
        Backwards Words
      Add 3 and 7 = 3 + 7
The sum of 3 and 7 = 3 + 7
   3 increased by 7 = 3 + 7
The total of 3 and 7 = 3 + 7

     3 more than 7 = 7 + 3
      3 added to 7 = 7 + 3
           Backwards Words
            7 subtract 3 = 7 - 3
The difference of 7 and 3 = 7 - 3
       7 decreased by 3 = 7 - 3
      7 diminished by 3 = 7 - 3
                7 less 3 = 7 - 3

           7 less than 3 = 3 - 7
     7 subtracted from 3 = 3 - 7
Translate the following phrases.
1) Five plus x minus 3
          5+x-3
2) Three times y less 4
          3y  4
3) Eight multiplied by y minus 7
          8y - 7
4) The product of 10 and m decreased by 7
         10m - 7
5) Four more than the quotient of x and 3
                        x 4
         x  3  4 or
                        3
6) Six times m plus 8
          6m + 8
Match each phrase with its variable expression.
d 1) Twice the sum of x and 3       a) 2x  3
                                   b) 3(x  2)
e 2) Two less than the product
       of 3 and x                  c) 3x  2
b 3) Three times the difference    d) 2(x  3)
       of x and 2                   e) 3x  2
a 4) Twice a number x less 3

c 5) Two more than 3 times a
       number x
Translate the following phrases.
1) 5 less than a number x
          x-5
2) 5 less a number x
          5-x
3) 5 less twice a number x
          5 - 2x
4) 2 more than the difference of x and 5
          (x - 5) + 2
5) Twice the difference of x and 5
           2(x - 5)
6) Twice the sum of x and 5
           2(x + 5)
Write a phrase that describes each variable
expression below.
 1) 4  x  5  2
    Four times the sum of x and 5 minus 2

 2) 7  2  x  3
    Seven minus twice the quotient of x and 3

 3) m  9  4
    The quotient of m and 9 minus 4
Define a variable to represent the unknown and
write the phrase as a variable expression.
1) 10 mph faster than the Honda
      Let x = the speed of the Honda
              x + 10
2) 7 inches shorter than Jill’s brother
      Let b = the height of Jill’s brother
              b-7
3) 5 acres larger than twice the size of my lot
      Let k = the size of my lot
              2k + 5
4) $7.50 times the number of people plus a
      $20 group registration
      Let y = the number of people
              $7.5y + $20
         Problem Situation #1
A cab driver charges a surcharge of $4 plus
$1.50 per mile. Write a variable expression
that represents the total cost of the fare.

       Let x = # of miles driven
              4 + 1.5x
          Problem Situation #2
ATI Phone Services charges a monthly fee of
$16 plus 18 cents a minute for local calls and
40 cents a minute for long distance. Write a
variable expression that describes the total
monthly bill.
        Let a = # of local minutes
        Let b = # of long distance minutes
           16 + 0.18a + 0.40b

				
DOCUMENT INFO