Kirana buys boxes of crackers that each has the same cost x. She represents the cost of 2 boxes of cheese​ crackers, 4 boxes of poppy seed​ crackers, and 4 boxes of plain crackers using the expression 2x+4x+4x. What equivalent expression can represent the​ cost? A. 11x
B. (2+4)4x
C. 2•4•4•x
D. 10x

10x

Step-by-step explanation:

2x + 4x + 4x = 10x

B. (2+4)4x

Step-by-step explanation:

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.