∠ABC and ∠CBD are A) complementary. B) supplementary. C) congruent. D) vertical. please help i need this for an exam

What is always true when two whole numbers are subtracted?

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120

Agrasshopper weighs 0.89 grams. express the grasshopper’s weight in scientific notation.