Question

sue has collected 30 rocks for science class jared has collected 23 fewer rocks. how many rocks ha jared collected? options: 23 - 30 = r; 30 - 23 = r; 30 - r = 23; 30 + 23 = r; r + 23 = 30

Explanation:

Step1: Identify correct equation

Jared has 23 fewer rocks than Sue's 30, so subtract 23 from 30 to find Jared's rock count $r$.
$30 - 23 = r$
Also, since Jared's count plus 23 equals Sue's count, $r + 23 = 30$ and rearranging gives $30 - r = 23$, which are also valid.

Step2: Calculate Jared's rocks

Solve $30 - 23 = r$
$r = 7$

Answer:

Valid equations:

• $30 - 23 = r$
• $30 - r = 23$
• $r + 23 = 30$

Jared collected 7 rocks.