Please help me I am stuck

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Which of the following transformations will always produce a congruent figure?

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