How did Kelplers describe the planets orbit A. The planets orbits are circular
B. The planets orbits are elliptical
C. The planets and the orbit earth
D. The planets have miniature orbits called epicycles

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.