Simplify the expression. 19m – 4m^2 + 4m^2

19m

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

Identify

19m - 4m² + 4m²

Step 2: Simplify

[Addition] Combine like terms:                                                                        19m

19m-4m^2+4m^2

-4m^2+4m^2; since both are opposite you subtract which is zero

Answer=19m

10.8109 amu

Step-by-step explanation:

The average atomic mass of boron is determined as the average of the atomic masses of both isotopes weighed by their respective abundances.

Therefore, the average atomic mass is given by:

The average atomic mass of boron isotopes is 10.8109 amu.