St. Mark's Community Barbecue served 250 dinners. A child's plate cost $3.50 and an adult's plate cost $7.00. A total of $1,347.50 was collected. How many of each type of plate was served?
lets try this one?
Stacey Warren - Expert brainly.com
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Ok so here you have to set up a system of equations based on the information you have. Its not important why, but you should know that if you want to solve for two varibles you need two eqautions to put it simply.
Ill give you a hint
let x = number of kids plates
let y = number of adult plates
first equation based on how many plates sold
second equation based on price and revenue of plates