What are solution to quadratics are called what

Step-by-step explanation:

The solutions to quadratic equations are known as roots or zeroes of the equation. We can solve quadratic equations using three methods such as factoring, the quadratic formula, and completing the square.

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the forst and 3rd

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.