Solve the system of equations by multiplying and adding. braceleftze −6x + 9y = −39 8x + y = 0 Write the solution as an ordered pair: . If necessary, write the answer in fraction form.

Step-by-step explanation:

the system of equations is:

First, we multiply the second equation by -9:

and now we add this to the first original equation:

we have eliminated the y variable, so we can solve for x:

with this value of x, we substitute it on the second of the original set of equations to find the value of y:

the answer as an ordered pair is:

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.

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: