Bradley says that if point b is reflected across the y-axis and it's reflection is then reflected across the x -axis, the result is point D . Is Bradley correct? explain.

Bradley is not correct

see the explanation

Step-by-step explanation:

The picture of the question in the attached figure

step 1

Reflection across the y-axis

we know that

The rule of the reflection of a point across the y-axis is given by

(x,y) ----> (-x,y)

The x-coordinate changes sign, and the y-coordinate remains the same

so

The coordinates of point B are (4,-4)

Applying the rule of the reflection across the y-axis

B(4,-4) -----> B'(-4,-4)

step 2

Reflection across the x-axis

we know that

The rule of the reflection of a point across the x-axis is given by

(x,y) ----> (x,-y)

The y-coordinate changes sign, and the x-coordinate remains the same

so

The coordinates of point B' are (-4,-4)

Applying the rule of the reflection across the y-axis

B'(-4,-4) -----> B''(-4,4)

step 3

Compare the coordiantes of point B'' with the coordinates of point D

B''(-4,4)

D(-2,4)

therefore

Bradley is not correct

Point B'' is not the same that point D

add an !

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.