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12 n A cake weighing 12 kg is cut into n equal pieces. How much does each piece weigh? 12 n

n + 8 2(n + 8) A pencil costs n pence. A ruler costs 8p more than a pencil. 1. How much does a ruler cost? 2. How much do 2 rulers cost? n + 8 2(n + 8)

56x xy A coach has 56 seats. 1. How many seats are there on x coaches? A coach has y seats. 2. How many seats are there on x coaches? xy

90 n + 1 A prize of £90 is shared between you and n other friends. How much does each person receive? 90 n + 1

x + y 65x + 80y = T I buy x lollies at 65p each and y lollies at 80p each 1. How many lollies do I buy altogether? x + y 2. Write a formula for the total cost, T. 65x + 80y = T

4(n + 2) = T A box contains n chocolates. The shopkeeper puts an extra 2 chocolates into each box. A girl buys 4 boxes. Write a formula for the total number, T of chocolates she has? 4(n + 2) = T

A cookery book gives the following rule to roast a chicken. Total Time = 40 minutes per kg plus 25 minutes Write a formula for the time needed to roast a chicken using this rule. (Use x for weight in kg and T for time in minutes.) 40x + 25 = T

xy T = 5 - xy Kyra has £5 to spend. She buys x pens at y pence each. 1. Write an expression for the total amount she spends. xy 2. Write a formula for the amount of change she receives. Use T for her total change. T = 5 - xy

75x + 12y In a café a cup of tea cost 75p and a biscuit costs 12p? How much does x cups of tea and y biscuits cost? 75x + 12y

A tool hire firm charges £20 to hire a cement mixer for 1 day and £9 for every extra day. Write a formula for the total cost, T to hire a cement mixer for x days. T = 9(x – 1) + 20

6(n + 25) Ashley earns £n per week. She has a pay rise of £25 per week? How much does she now earn in 6 weeks? 6(n + 25)

20x - 45 Sean and Dean organise a quiz evening. A quiz team is made up of four people. Each team is charged £8 to enter. They spend £20 on prizes and £25 on refreshments. There are x teams at the quiz. On average, each member spends £3 on refreshments. Write down an expression in x for the profit they make. 20x - 45