What is the solution to the system of equations?
{x=2y+3
{4x-5y=9

(1,-1)

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :).

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.

40 x 50 = 2000

step-by-step explanation: