Question

olive has read 79 pages of her book.which equations shows how many more pages she has to read.

Answer 1

Suppose the book has x pages, then in the beginning before Olive has read any pages in it. Once she has read 79 pages, this means that she now has 79 fewer pages to read than what she had at the beginning. An expression that represents the number of pages left in the book is  $x-79.$

If $F(x)$ is the equation that represents the number of pages left for olive to read is  $F(x)= x-79.$