Which equation illustrates dividing out a common factor as the first step to solve the equation 2x + 4 = 2x + 2

Which pair of angles are vertical angles? ∠1 and ∠4∠1 and ∠2∠2 and ∠4∠2 and ∠3more than one answer.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.