Sarah went to the grocery store and bought 4 loaves of bread and 1 gallon of milk for $12. the next week, sarah bought 2 loaves of bread and 3 gallons of milk for $13.50. which system of equations below can be used to determine the cost of one loaf of bread (b) and one gallon of milk (m)? a 4m × b = $12 2m × 3b = $13.50 b 4b × m = $12 2b × 3m = $13.50 c 4m + b = $12 2m + 3b = $13.50 d 4b + m = $12 2b + 3m = $13.50

D.

Step-by-step explanation:

You want to add the totals for bread and milk together, you would not want to multiply.

Also, there were 4 loaves of bread bought, so 4m would be incorrect.

By process of elimination, we see that answer D is correct!

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.