Rema spent 6 days reading her book, completing the same fraction of the book each day, if she read a total of 8/9 of her book after 6 days, what fraction of the book did she read each day?

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18