Simplify: (-7a - 19c) - (-12a + 30c) - (-21a - 11c)

a. -16a - 60c

b. 2a + 22c

c. 26a + 38c

d. 26a - 38c

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no