<h3>
Answer:</h3>

<h3>
Step-by-step explanation:</h3>
An exponent represents repeated multiplication. For example, ...
... x^3 = x·x·x
... x^2 = x·x
If we divide these, the x's in the denominator cancel an equal number in the numerator:
... (x·x·x)/(x·x) = x
If we represent the repeated multiplication using exponents, we can represent the cancellation by subtraction:
... (x^3)/(x^2) = x^(3-2) = x^1 = x
Once we have this idea in mind that division can be done by subtracting denominator exponents, we can use it regardless of the magnitude or sign of the exponents involved.
Answer: C
4x7*2-25
4x49-25
196-25
= 171
The answer is 6.
Hope This Helps.
PQR ~ PSQ, PQS ~ QRS (edit: and PQR ~ QSR woops forgot that!). So A, B and D.
C isn't true because it's comparing an angle to a straight line.
Sorry the photo's messy, just wanted to show my ugly process lol.