Comparing Solutions
Which of these statements best explains why pure water has a pH of 7?
Pure water contains only H2O molecules, but pH is based on the concentration of H3O+ ions.
Each molecule of water can dissociate to form 7 H30+ ions.
Water self-ionizes to form an equilibrium system that has [H3O+] = 1.0 x 10-7 M.
DONE
1) Intro

What is the inverse of the function f(x) = 2x + 1?

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )

What is the perimeter of an equilateral triangle if each side is (x+3)?