Question 1: Write an expression for the total number of leaves on x trees, if each tree has 45 leaves.

Answer: 45x

Question 2: If each plant produces 12 flowers and there are y plants, write an expression for the total number of flowers.

Answer: 12y

Question 3: Express the total amount of water (in liters) used if each of 8 trees consumes 15 liters daily.

Answer: 15*8

Question 4: Calculate the total number of fruits if a tree bears 35 fruits and there are z trees.

Answer: 35z

Question 5: A pond has 150 fish. If each fish consumes 0.5 kg of food daily, write an expression for the total food needed per day.

Answer: 0.5*150

Question 6: In a forest, each tree has 80 leaves. Write an algebraic expression for the total leaves if there are t trees.

Answer: 80t

Question 7: Express the total amount of sunlight (in hours) received if each of 5 solar panels receives 6 hours of sunlight per day.

Answer: 6*5

Question 8: A rainforest has 200 trees. Each tree absorbs 20 kg of CO2 yearly. Write an expression for total CO2 absorbed.

Answer: 20*200

Question 9: Construct a formula for the total energy (in joules) used by n solar cells, each producing 150 joules per hour.

Answer: 150*n

Question 10: A conservation project plants 300 trees. If each tree costs $15 to plant, write an expression for the total cost.

Answer: 15*300

Question 11: Common Error: A student writes the expression for the total number of leaves as '45 + x'. Explain why this is incorrect and correct it.

Answer: Because '45 + x' implies adding a fixed number of leaves to x, but if each tree has 45 leaves, total leaves depend on the number of trees multiplied by 45, so the correct expression is '45x'.