Ian has 12.2 ounce bottle of ketchup. he uses 1/20 of the ketchup every time he has a buffalo burger. how many ounces of ketchup are left after ian has eaten 4 buffalo burgers.

9.76 ounces

Step-by-step explanation:

Ian has 12.2 ounce bottle of ketchup.

He uses of the ketchup every time he has a buffalo burger.

× 12.2

= 0.61 ounces every time

He has eaten 4 buffalo burgers. So he used ketchup = 0.61 × 4

                                                                                        = 2.44 ounces

Now the amount of ketchup are left = 12.2 - 2.44

                                                           = 9.76 ounces

9.76 ounces of ketchup are left after Ian has eaten 4 buffalo burgers.

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

step-by-step explanation: