(.I)) 10. A manager purchased 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?

Question

(.I)) 10. A manager purchased 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?

Accepted Answer

Step:1 ：Let x be the number of coffee mugs and y be the number of key chains.Step:2 ：Write the system of equations: ( begin{cases} x+y=21  8.50x+2.75y=132.50 end{cases} )Step:3 ：Solve for x and y: (x=10), (y=11)

Answer

Step: 1 ：Let x be the number of coffee mugs and y be the number of key chains.Step: 2 ：Write the system of equations: ( begin{cases} x+y=21  8.50x+2.75y=132.50 end{cases} )Step: 3 ：Solve for x and y: (x=10), (y=11)

(.I)) 10. A manager purchased 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

Popular Problems

(.I)) 10. A manager purchased 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

Popular Problems

(.I)) 10. A manager purchased 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?