I= Eb divided by r + eb . Solve for E

Od. 130 degrees because if you add them together you get the 130

29. because you will divide each number of months by 12 to find the number of years. which would mean, 5, 12.5, 16, 45, 50, 72.5. which is crazy. anyhow, i think you find the median in the middle. and yea hope your test goes good

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table