If you have $161.98 and you buy something for $19.99, how much do you have left?

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

3. solve the given inequality and graph the solution on a number line.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?