Question

A teacher asks a student to write and solve an inequality to find what numbers satisfy the statement that 3.2 more than 7 times a number, n, is less than 17.2. The table shows the student's work. Which statement is true? Step Work 1 7n + 3.2 < 17.2 2 7n< 14 3 n

Answer 1

Let me solve the inequality for you:

`\begin{gathered} 7n_{}+3.2<17.2 \\ 7n<17.2-3.2 \\ 7n<14 \\ n<(14)/(7) \\ n<2 \end{gathered}`

Comparing our solution to that of the student, we can clearly see that the last step is wrong.

Instead of dividing by 7, seven is mistakenly put as the answer.

Looking at the correct choice, D is right.

Correct Answer: D