Problema Solution
Mary McDonald makes mugs in Miami. She makes two sizes of mugs: a small mug that she sells for $2.50 and a large mug that she sells for $5.75. Yesterday Mary made $56. Before she opened her shop in the morning, she had 200 mugs in her inventory. At the end of the day she has 188. How many mugs of each price did she sell?
Answer provided by our tutors
200-188 = 12 mugs sold that day
let 'x' represent the number of $2.50 mugs sold, then '12-x' represents the number of $5.75 mugs sold
56 = 2.5x + (12-x)5.75
solving for 'x' we have x=4
12-4=8
Mary sold 4 mugs at $2.50 and 8 mugs at $5.75