Solve the system of linear equations 1x-2y=-60 and 5x+6y=20

What is the slope of the line shown below?

Can someone me and do the problem plz so i can understand it more better

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