McGraw Hill Glencoe Algebra 1, 2012
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McGraw Hill Glencoe Algebra 1, 2012 View details
9. Weighted Averages
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Exercise 7 Page 136

Practice makes perfect
a The following information about Party Supplies Inc. is given.
  • They sell metallic balloons for each and helium balloons per bunch.
  • They sold more metallic balloons than the number of bunches of helium balloons.
  • The total sales for both types of balloons were

If is the number of metallic balloons that were sold, we can complete the given table.

Number Price Calculation Total
Metallic Baloons
Bunches of Helium Balloons
b The equation that represents the problem can be written as the sum of the total income from both types of balloons. Using the table from Part A, we know these values. We also know that the sum should come to a total of
We can simplify this equation a little bit by combining like terms.
c Let's find the number of metallic balloons that were sold by solving the equation from Part B.
The number of metallic balloons that were sold is
d We know that the number of bunches of helium balloons is less than the number of metallic balloons and that We can now find how many bunches of helium balloons were sold.
Thus, the number of bunches of helium balloons were sold is