The product of the ages of a father and his son is 576.if the father is 18 years younger than 5 times his son .how old is each?

Step-by-step explanation:

Given

Represent the sons age with S and the father's age with F

Required

Determine F and S

Substitute 5S - 18 for F in the first equation

Open Bracket

Equate to 0

Solve using quadratic formula:

Where

or

 or

or

Since, age can't be negative.

We have that:

Recall that:

Hence:

The father is 45 years old and the son is 13 years old (Approximated)

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.