Directions: Choose the letter of the correct answer. Solve the system of equation y=4x-5 and y=3x
A. y=10, x=13
B. y=5, x=15
C. y=7, x=6

Solve the system of
equation -4x+5y=35 and y=3x
A. X-15 y=19
B. x-14 y=11
C. x=45 y=12

Step-by-step explanation:

1) y = 3x (I)

  y = 4x  - 5 (II)

Plug in y= 3x in equation (II)

3x  =  4x - 5

3x + 5 = 4x

       5 = 4x - 3x

      5 = x

x= 5

Plug in s = 5 in equation (I)

y = 3*5 = 15

x = 5

y = 15

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.