Answer:
Choice B and Choise C.
Step-by-step explanation:
Equivalent expressions are those expressions that have the same value but they look different.
Given the following expression provided in the exercise:

You need to remember the multiplication of signs in order to find the equivalent expressions:

Then:
- Eliminating the parentheses, you get this equivalent expression:

- Since the mulplication of two negative signs gives yous a positive sign, you can rewrite the original expression in this form:

This is an equivalent expression to 
Answer: 0.09523
Step-by-step explanation:
All you would do is multiply .9 by 20
.9*20=18
90% of 20 is 18
-2, -3, -4.
an integer is a number that isn't a fraction. so literally any natural number like 1, 0, or -1. all integers.