Q75: <span class="ql-formula" data-value="\frac{x^{2}-1}{3 x+3} \cdot \frac{x+3}{x-1}"><span class="katex"><span
Q76: One maid can clean the house
Q77: Identify the given function as a
Q78: Evaluate the rational expression for the
Q79: <span class="ql-formula" data-value="\frac{4 x+8}{x-3} \cdot \frac{2 x^{2}-12
Q81: Simplify the difference quotient <span
Q82: <span class="ql-formula" data-value="y"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>y</mi></mrow><annotation encoding="application/x-tex">y</annotation></semantics></math></span><span
Q83: <span class="ql-formula" data-value="\frac{4 x}{x-5}+\frac{20}{5-x}"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mfrac><mrow><mn>4</mn><mi>x</mi></mrow><mrow><mi>x</mi><mo>−</mo><mn>5</mn></mrow></mfrac><mo>+</mo><mfrac><mn>20</mn><mrow><mn>5</mn><mo>−</mo><mi>x</mi></mrow></mfrac></mrow><annotation
Q84: <span class="ql-formula" data-value="\frac{x^{2}+8 x+15}{x^{2}+10 x+21} \cdot \frac{x^{2}+9
Q85: For the given functions <span