Answer
A) $-32.50
Work Step by Step
Convert the word problem into an algebraic expression to determine the change in value.
$\underbrace{100\ shares\ decr\ by\ \$0.40/share\ }\underbrace{30\ shares\ incr\ by\ \$0.25/share}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 100\times(-0.40)\ \ \ \ \ \ \ \ \ \ +\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 30\times0.25\ \ \ \ \ $
Use the order of operations to find the change in value.
$100\times(-0.40)+30\times0.25\longrightarrow$multiply
$=-40+7.50\longrightarrow$ add
$=-32.50$
The change in value is -$32.50.
