The smaller triangle is a pre-image of the bigger triangle. the center of dilation is (1, −1).

what is the scale factor used to create the dilation?

a 1/4
b 6
c -4
d 4

The scale factor is

Step-by-step explanation:

Lets have a look to the co-ordinates of triangle ABC and A'B'C.

The point of C= and B=

The point of C=  and A'=

By applying distance formula we can calculate the distance of line segment :

BC ===2

Similarly CA==8

Scale factor = K===4

The image and its preimage lies in opposite sides of center of dilation, C= therefore the scale factor will be negative.

Our final answer = -4

x + 107

step-by-step explanation:

let's say that the number he had before the mistake was x. then, he will have 107 dollars more than this, so the answer is x + 107.

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