Salma bought some books for $4 each and received a discount of $5 off of her total purchase. She spent $71 after the discount. How many books did she buy?(a) Write an equation that could be used to answer the question above. First, choose the appropriate form. Then, fill in the blanks with the numbers 4, 5, and 71. Let b represent the number of books.=+b=−b(b) Solve the equation in part (a) to find the number of books.=b

Nicole sold t-shirts at a festival and made a profit of $83. She made $5 for each t-shirt she sold. Her total expenses were $22. How many t-shirts did she sell?(a) Write an equation that could be used to answer the question above. First, choose the appropriate form. Then, fill in the blanks with the numbers 83, 5, and 22. Let x represent the number of t-shirts.=+x=−x(b) Solve the equation in part (a) to find the number of t-shirts.=x

Maria is saving money to buy a bike. She has $60 and is going to save an additional $5 each week. The bike costs $125. In how many weeks will she have enough money to buy the bike?(a) Write an equation that could be used to answer the question above. First, choose the appropriate form. Then, fill in the blanks with the numbers 60, 5, and 125. Let w represent the number of weeks.=+w=−w(b) Solve the equation in part (a) to find the number of weeks.=w

Rita earns 44 dollars each week working part-time at a bookstore. She earns one additional dollar for each book that she sells.Let A be the amount (in dollars) that Rita earns in a week if she sells B books.Write an equation relating A to B. Then use this equation to find the amount of money Rita earns if she sells 25 books.

David bought three DVDs and four books for $40. Anna spent $18 and bought one DVD and six books. Solve the system of equations to determine the cost of each DVD and book.

Ava is starting a cake-baking business, and she has just spent $150 for equipment. She figures that each cake will cost $4.50 to make, and she plans to sell her cakes for $12 each.Ava wants to find the number of cakes, c, she must sell to break even. In other words, she wants to know how many cakes she must sell before she has made as much money as she has spent. Which equation can she use?150+4.5c=12cc(150+4.5)=12c4.5c+12c=150150–4.5c=12c4.5c+150=12150c+4.5=12How many cakes must Ava sell before she has made as much money as she has spent?cakesSubmit