Q81: Multiply.<br>- <span class="ql-formula" data-value="\left(4 x^{2}-9 x\right)\left(4
Q82: Give the coefficient and degree of
Q83: Write the number in scientific notation.<br>-0.000000855016<br>A)
Q84: Tell whether or not the number
Q85: Perform the division.<br>- <span class="ql-formula" data-value="\frac{-8
Q87: Multiply.<br>- <span class="ql-formula" data-value="5(4 \mathrm{x})"><span class="katex"><span
Q88: Simplify.<br>- <span class="ql-formula" data-value="\left(\frac{4}{x}\right)^{3}"><span class="katex"><span class="katex-mathml"><math
Q89: Multiply.<br>- <span class="ql-formula" data-value="\left(-14 x^{3}\right)(-1)"><span class="katex"><span
Q90: Divide and simplify.<br>- <span class="ql-formula" data-value="\frac{t^{-2}}{t^{-7}}"><span
Q91: Collect like terms and then arrange