WILL MARK BRAINLIEST Explain how to solve 2^x+1 = 9 using the change of base formula log base b of y equals log y over log b. Include the solution for x in your answer. Round your answer to the nearest thousandth.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]