Problem
(.) https://www.ixl.com/math/grade-7/identify-equivalent-linear-expressions Search topics and skills earning Assessment Analytios Math [10. Language arts Recommendations Seventh grade \( > \) R.21 Identify equivalent linear expressions I DRB Which expression is equivalent to \( 5(6 f+9)+8 f \) ? \[ 14 f+45 \] \[ 38 f+9 \] \[ 45 f+38 \] \[ 38 f+45 \]
Solution
Step 1 ：Distribute the 5 through the parentheses: \( 5(6f + 9) \) = \( 30f + 45 \)
Step 2 ：Add the 8f: \( (30f + 45) + 8f = 38f + 45 \)
Step 3 ：The equivalent expression is \( 38f + 45 \)
