### Home > INT1 > Chapter A > Lesson A.1.4 > Problem A-42

A-42.

Evaluate each equation below.

For

, what is the value of?Rewrite the expression, substituting in the known variable.

For

when, what is the value of ?See part (a) for a strategy to evaluate this expression.

Remember to pay attention to negative signs.For

when, what is the value of?Rewrite the expression, substituting in the known variable.

For

, what is the value of?Refer to parts (a) and (c).

For

when , what is the value of?Rewrite the problem, substituting in the known variable and then rearrange the problem to make it equal to the unknown variable.