B’ is the of b. reflection preimage dilation image

image

Step-by-step explanation:

In geometric transformation, a figure is mapped to another form another figure. The points in original image are called preimage of the points formed in the transformed figure that is called image.

There are four types of transformations:

translation

reflection

dilation

rotation

In the given case  the figure is translated i.e. all the points in the preimage moved with the same distance and direction. As B is preimage of B'

Hence B’ is the image of B!

894.19 mi/hr

Step-by-step explanation:

Total distance of the trip = 3990 mi

Let the speed of the sound be 'x' miles per hour

Now,

Total distance = Speed × Time

Therefore,

According to the question

3,990 mi = [ ( x - 120 ) × 0.1 ] + [ ( x + 410 ) × 3.0 ]

or

3,990 mi = 0.1x - 12 + 3x + 1230

or

0.1x + 3x = 2772

or

3.1x = 2772

or

x = 894.19 mi/hr