3. A local foundation organized a lunch party for all the kids in the community. They ordered a total of 500 burger meals. They ordered plain
bugers at $1.75 each, cheeseburgers at $2.50 each and chicken burgers
at $3.20 each. They ordered mostly cheeseburgers, and 100 fewer chicken burgers than plain burgers. The total order came to $1,72.50.
Define the variables and write a system of equations to represent the
Situation

360 different combinations

a) 7x=7

step-by-step explanation:

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

step-by-step explanation:

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