a. To write 0.6222 as a fraction you have to write 0.6222 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.
X - the price of each pair of shoes; 3 x + 7.50 + 0.06 * 3 x = 126.81 3 x + 0.18 x + 7.50 = 126.81 3.18 x = 126.81 - 7.50 3.18 x = 119.31 x = 119.31 : 3.18 x = 37.52 Answer: A ) $37.52