Multiply Do Not Simplify $\frac { 2 a + 1 } { 9 a - 1 } \cdot \frac { a } { a }$

Q27: Find the reciprocal.<br>- <span class="ql-formula" data-value="9

Q28: Perform the indicated operation. Simplify, if

Q29: Find the reciprocal.<br>- <span class="ql-formula" data-value="\frac

Q30: Divide and simplify.<br>- <span class="ql-formula" data-value="\frac

Q31: Subtract. Simplify, if possible.<br>- <span class="ql-formula"

Q33: Subtract. Simplify, if possible.<br>- <span class="ql-formula"

Q34: Find all numbers for which the

Q35: Perform the indicated operation. Simplify, if

Q36: Subtract. Simplify, if possible.<br>- <span class="ql-formula"

Q37: Add, first finding the LCD. Simplify,