What does -2 - 10 equal to?

What is the 12th term of b(n)=-4-2(n-1)

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1