What are the zeros of the function by the expression -x² - 9x -8​

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?