Simplify by combining like terms 4b-7m -4m +5b

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Which of the following is the result of expanding the series

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.