Jennifer is completing the square to solve the quadratic equation
x^2 - x - 3 = 0.

what should be her first step?
a- adding -x to both sides of the equation
b- isolating the constant, -3
c- isolating the first term, x^2

Isolate the variable by dividing each side by factors that don't contain the variable.

Hope it helps! :)

QuezoMartiinez <3

The answer is B- Isolating the constant, -3

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.