a manager purchesed a total of 21 coffee mugs and key chains. each coffee mug cost $8.50, and each key chain cost $2.75. if the manager spent a total of $132.50, how many coffee mugs did the manager purchase?

Answer soon(fast) 15 pts-brainliest? for right answer with small explination a restaurant catered a party for 40 people. a child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. the total cost of the dinner was $728. how many children and adults were at the party? use the table to guess and check.(i couldn't get the graph onto the question)                                8 children and 32 adults9 children and 31 adults10 children and 30 adults12 children and 28 adults

What is the difference between regular convex and concave polygons

What is the solution of the systems of equations? y=2/3x+3 x=-2