By using the 20 percent off coupon that she found in the newspaper, jill saved $4 on the extra large bag of dog food that she bought.

The dog food was originally 20 dollars

$20

Step-by-step explanation:

4 x 5 (if you used a chart you would get why I used 5) would equal 20, which means $20 is the cost of the bag of dog food without the coupon

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

yes

step-by-step explanation: