An inch is equal to about 2.54 cm write an expression which estimate the number of centimeters in X inches then estimate the number of centimeters in 12 inches

Expression :2.54 x

Number of centimeters in 12 inches : 30.48

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

So, to estimate the number of centimeters in x inches:

2.54 x

Where "x" is the number of inches.

To estimate the number of centimeters in 12 inches, we simply replace the variable "x" (number of inches) by the number 12.

Mathematically speaking:

2.54 (12)= 30.48 centimeters

Feel free to ask for more if needed or if you did not understand something.

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.

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column