Answer:
D. 
Step-by-step explanation:
Let be
. To find the equivalent expression we must use the following property:
(1)
Based on this fact, we find the following equivalence:

Hence, the correct answer is D.
I think that it is 2 602/1000
Not equivalent to any of the given expressions.
Step-by-step explanation:

Hence,
is not equivalent to any of the given expressions.
Answer:
x = 6
Step-by-step explanation:
QRST is a square.
QR = RS (sides of a square are equal)
7x - 10 = 5x + 2
7x - 5x = 10 + 2
2x = 12
x = 12/2
x = 6