[lynn333]

A store sells 500 cups totaling 1897.50 dollars. A the plastic cups sold at 2.75 and the ceramic ones at5.50 each. What was the total cost of each set, plastic and ceramic and how many cups were 2,75 and how many were 5.50?

[Unknown008]

Assign variables to the plastic and ceramic cups.

Let p be the number of plastic cups and c be the number of ceramic cups.

There are a total of 500 cups, so that:

p + c = 500

The total cost for the plastic cups is the number of cups, multiplied by the cost of each, that is the total cost of plastic cups is 2.75p. With the same reasoning, the total cost for the ceramic cups is 5.50c.

Together, they cost $1897.50. Which means:

2.75p + 5.50c = 1897.50

You have two equations with two unknowns, can you solve it? :)

[lynn333]

the problem is 2.75p divided by 5,50c = 1897.50. How do I find the unknowns in the two equations

[Unknown008]

the problem is 2.75p divided by 5,50c = 1897.50. How do I find the unknowns in the two equations

I'm sorry, but where did you get division? :confused:

[axel2012]

The total accrued interest owed as of August 31 on a loan advanced the preceding June 3 was $169.66. If the variable interest rate started at 8 3/4%, rose to 9% effective July 1, and increased another 1/2% effective July 31, what was the principal amount of the loan?

[fredrrrick]

Problem 6
Retailers purchased $511 million worth of guitars from mfr’s- some 861,300 guitars – according to a study done by the NAMM.
A) What would be the average selling price for a guitar?
B) Based on the average selling price, if mfr’s markup on cost is 40%, what would be the average cost?