Q285: Simplify.<br>- <span class="ql-formula" data-value="\left(x^{-4}\right)^{-4}"><span class="katex"><span class="katex-mathml"><math
Q286: Express using positive exponents. Then simplify.<br>-
Q287: Write the number in scientific notation.<br>-0.000008656<br>A)
Q288: Multiply mentally<br>- <span class="ql-formula" data-value="\left(x-6 x^{3}\right)^{2}"><span
Q289: Add.<br>-<img src="https://d2lvgg3v3hfg70.cloudfront.net/TB9836/.jpg" alt=" Add. -
Q291: Identify the polynomial as a monomial,
Q292: Simplify.<br>- <span class="ql-formula" data-value="\left(-5 x^{5} y\right)^{4}"><span
Q293: Collect like terms and then arrange
Q294: Divide and simplify.<br>- <span class="ql-formula" data-value="\frac{x}{x^{13}}"><span
Q295: Multiply.<br>- <span class="ql-formula" data-value="(0.1 x-0.3)^{2}"><span class="katex"><span