answer:To solve this problem, we need to calculate the final amount each person has after all debts are paid.Initially:- Alice has 75.- Ben has 42.- Charlie has 60.Transactions:1. Alice owes Ben 25: Alice now has 75 - 25 = 50, Ben now has 42 + 25 = 67.2. Ben owes Charlie 30: Ben now has 67 - 30 = 37, Charlie now has 60 + 30 = 90.3. Charlie owes Alice 20: Charlie now has 90 - 20 = 70, Alice now has 50 + 20 = 70.After all debts are paid:- Alice has 70.- Charlie has 70.Together, Alice and Charlie have 70 + 70 = 140.So, Alice and Charlie have boxed{140} dollars together after all debts are paid.

answer:Let's break it down:* The bookstore sells 30 magazines every week.* It sells 25 more novels than magazines every week, so it sells 30 + 25 = 55 novels every week.* To find the total number of novels and magazines sold in a week, we add 30 (magazines) + 55 (novels) = 85.* Since there are 52 weeks in a year, we multiply 85 by 52 to get the total number of novels and magazines sold in a year: 85 * 52 = 4420.So, the bookstore will sell boxed{4420} novels and magazines in a year.

answer:Let x be the number of floors in the Downtown Plaza.Then the number of floors in the Atlas Tower is x + 8.Together, the Downtown Plaza and the Atlas Tower have x + (x+8) = 50 floors.Simplifying this, we have 2x + 8 = 50.Subtracting 8 from both sides, we have 2x = 42.Dividing both sides by 2, we have x = 21.So the Atlas Tower has x + 8 = 21 + 8 = 29 floors.Thus, the Atlas Tower has boxed{29} floors.

answer:Let's solve this new question.One butterfly lays 30 eggs.60% of these eggs successfully hatch.So the number of eggs that successfully hatch for one butterfly is 30 * 60 / 100 = 1800 / 100 = 18For 8 butterflies, the total number of caterpillars is 8 * 18 = 144.Thus, 8 butterflies produce boxed{144} caterpillars.

answer:Let's break down the problem step by step.We are given that there are 75 participants in the parade, and 2/3 of them are riding on bicycles.To find the number of participants riding bicycles, we can calculate 2/3 of 75, which is:(2/3) × 75 = 50So, there are 50 participants riding bicycles.Since each bicycle has 2 wheels, the total number of wheels from bicycles is:50 × 2 = 100Now, let's find the number of participants riding unicycles. Since there are 75 participants in total, and 50 of them are riding bicycles, the number of participants riding unicycles is:75 - 50 = 25Since each unicycle has 1 wheel, the total number of wheels from unicycles is:25 × 1 = 25Now, we can add the total number of wheels from bicycles and unicycles to find the combined total:100 + 25 = 125So, the unicycles and bicycles in the parade have a combined total of boxed{125} wheels.

answer:To find out how many boxes she tied, we first need to find out how much ribbon she used. Since she has 1 foot left, the amount of ribbon she used is 4.5 - 1 = 3.5 feet. If she uses 0.7 feet of ribbon to tie each box, the number of boxes she tied is 3.5 / 0.7.Thus, Marissa tied boxed{5} boxes.