Answer:
b. 
Step-by-step explanation:
The scale factor is the number by which one must multiply all sides in a triangle such that its sides are the same as another triangle. This only works in similar triangles (triangles where all of the angles between them are congruent or have the same measures).
5x2 would be 10 and 10-50x would be negative 40x and 40x + 125 would be 165x
Pretty sure just draw same line but a to r and b to s
Answer: Area = 2.1 
Step-by-step explanation:
ANSWER

EXPLANATION
The given expression is

The middle radical contains a perfect square.



Note that:

