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:
y=1/2x
Step-by-step explanation:
The slope of the line goes up by 1 over by 2 each time or 1/2. (Rise over run)
This can be proven by substituting X and Y for a point on the graph.
y=5, x=10
5=1/2(10)
5=5
- The Temperatures are on the top column numbers.
- The Wind speeds are on the left lateral numbers.
Answer: D, 23°F.