### Home > CC3MN > Chapter 2 > Lesson 2.1.4 > Problem 2-43

2-43.

Read the Math Notes box in this lesson. Then evaluate each expression below.

for Rewrite the expression, substituting in the known variable.

for See part (a) for a strategy to evaluate this expression. Remember to pay attention to negative signs.

for for Refer to parts (a) and (c).

Rewrite the problem, substituting in the known variable and then solve.