Maria solved the equation -5 1/8 n = -9 3/4 her answer was n = 1 37/41. she is fairly confident about her answer, but she wants to do a quick check of her solution using estimation. which of the following shows a good check of her answer? a. -6(2) = -12 b. -5(-2) = -10 c. -5(2) = -9 d. -5(2) = -10