uh oh
if pencils cost 20 cents and pens cost 30 cents each find the cost of the following items number 36 has r pens and p pencils
huh??
To find the cost of the items with a certain number of pens and pencils, we need to use the given prices per item.
Let's start by calculating the cost of one item with r pens. Each pen costs 30 cents, so the cost of r pens would be 30 cents multiplied by r.
Cost of r pens = 30 cents * r
Next, let's calculate the cost of one item with p pencils. Each pencil costs 20 cents, so the cost of p pencils would be 20 cents multiplied by p.
Cost of p pencils = 20 cents * p
Finally, we can calculate the total cost of one item with r pens and p pencils by summing up the individual costs of the pens and pencils.
Total cost of one item with r pens and p pencils = Cost of r pens + Cost of p pencils
Substituting the formulas we calculated earlier:
Total cost of one item with r pens and p pencils = (30 cents * r) + (20 cents * p)
So, the cost of the item with 36 pens (r) and p pencils is:
Total cost = (30 cents * 36) + (20 cents * p)
To calculate the total cost, you need to know the value of p.