Answer:
-3y
Step-by-step explanation:
-

--> -3
--> -3y
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about 45%
87/0 because they are equal.
The first two. In fact, you have

and
is irrational.
Similarly,
is irrational, and the same goes for
.
Instead, the square root and the second power simplify in the third option:

and similarly,

1. Calculate the square root: 5x4+7x5
2. Multiply 5x4=20 7x5 20+35
3. 20+35=55