Question 1: Simplify the expression: 3x + 5x.

Answer: 8x

Question 2: Calculate the total cost if you buy 4 apples costing $3 each and 2 bananas costing $2 each.

Answer: 16

Question 3: Express the sum of 7x and 4x as a single term.

Answer: 11x

Question 4: In a shopping bag, there are 5 candies and 3 chocolates. Write an expression for the total number of items, assuming each candy and chocolate is counted once.

Answer: 5 + 3

Question 5: If a shirt costs $15 and you buy 3 shirts, what is the total cost? Write the algebraic expression and simplify.

Answer: 45

Question 6: A customer buys 2 notebooks at $4 each and 3 pens at $1 each. Write an expression for the total spent and find the total.

Answer: 11

Question 7: Construct an expression representing the total amount spent if you buy x apples at $2 each and y oranges at $3 each.

Answer: 2x + 3y

Question 8: Simplify: 6a + 4a + 2a.

Answer: 12a

Question 9: A toy costs $12. If you buy x toys, write an expression for the total cost and calculate it when x=5.

Answer: 60

Question 10: A store sells 3 packs of pencils for $2 each and 2 packs of erasers for $1 each. Write an expression for total cost and find the total.

Answer: 8

Question 11: Identify and correct the mistake: An expression written as 4x + 3x gives 8x, but the student wrote 7x.

Answer: The mistake is in the addition; 4x + 3x = 7x, which is correct. The correction is to recognize the correct sum is 7x, not 8x.

Question 12: Challenge: If you buy x items costing $5 each and receive a discount of $2 per item, write an expression for the total cost and simplify.

Answer: 5x - 2x = 3x