Let g be the number of grandchildren, and d be the number of dogs. They both have only one head, so the number of heads is
Grandchildren have 2 legs, while dogs have 4. So, the total number of legs is
From the first equation (the one for the heads) we can derive
Substitute this into the second to get
So, there are 9 dogs and (from the first equation
The model of the granola bars is an illustration of <em>ratios and proportions</em>.
The model that shows the total serving is model A
The given parameters are:
So, the number of servings in both bars is:
Substitute 2 for Bars and 2/5 for Servings
Express as multiplication
The total number of servings is 5
The model that shows a total serving of 5 is model A (see attachment)
Read more about ratios and proportions at:
