Chapter 4, Problem 11PT

To determine

To find: the equation which is not used to determine the amount of money spent

Answer to Problem 11PT

The correct option is D

Explanation of Solution

Given:

Calculation:

To identify the incorrect expression, each equation need to be simplified.

(A).

Given: $3.75+n=10$

Making like terms a side,

  $\begin{array}{l}n=10-3.75\\ =6.25\end{array}$

This expression is equal to amount of money spent.

(B).

Given: $10-n=3.75$

Making like terms a side,

  $\begin{array}{l}n=10-3.75\\ =6.25\end{array}$

This expression is equal to amount of money spent.

(D).

Given: $10-n=3.75$

Making similar terms together,

  $\begin{array}{l}n=3.75-10\\ =-6.25\end{array}$

This expression is not equal to amount of money spent, because negative amount of money cannot be spent.

Conclusion:

Hence, the correct option is D.