Question

A math class is having a discussion on how to determine if the expressions 4x-x+ 5 and 8-3x-3 are equivalent using

substitution.

The class has suggested four different methods.

Which describes the correct method?

O Both expressions should be evaluated with one value. If the final values of the expressions are both positive, then the
two expressions must be equivalent.

OBoth expressions should be evaluated with one value. If the final values of the expressions are the same, then the
two expressions must be equivalent.

O Both expressions should be evaluated with two different values. If for each substituted value, the final values of the
expressions are positive, then the two expressions must be equivalent.

O Both expressions should be evaluated with two different values. If for each substituted value, the final values of the
expressions are the same, then the two expressions must be equivalent.

Answer 1

B

Explanation:

When you are trying to find if they are equivalent, you only want to use one value. If they are both positive, it doesn't mean that they are quivalent. They would have to be the same.

Answer 2

the correct answer is the second one

Explanation: