9 x 27 + 2 x 31 - 28 = order of operation says to do parentheses first (there are none) and then exponents (there are none of those either)
After that comes multiplication or division whichever comes first left to right. Since there is no division, we do the multiplication 9 x 27= 243 and the 2 x 31=62
243 + 62 -28 = 305 -28 = 277 - answer b
