a cake weighing 12 kg is cut into n equal pieces. how much does each piece weigh?
DESCRIPTION
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. A cake weighing 12 kg is cut into n equal pieces. How much does each piece weigh?. 12 n. 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). - PowerPoint PPT PresentationTRANSCRIPT
@lhmaths: Lesley Hall
1 2 3 4
5 6 7 8
9 10 11 12
@lhmaths: Lesley Hall
A cake weighing 12 kg is cut into n equal pieces.
How much does each piece weigh?
12n
@lhmaths: Lesley Hall
A pencil costs n pence.A ruler costs 8p more than a pencil.
1. How much does a ruler cost?
n + 8
2. How much do 2 rulers cost?
2(n + 8)
@lhmaths: Lesley Hall
A coach has 56 seats.
1. How many seats are there on x coaches?
56x
A coach has y seats.
2. How many seats are there on x coaches?
xy
@lhmaths: Lesley Hall
A prize of £90 is shared between you and n other friends.
How much does each person receive?
90n + 1
@lhmaths: Lesley Hall
I buy x lollies at 65p each and y lollies at 80p each
x + y
1. How many lollies do I buy altogether?
2. Write a formula for the total cost, T.
65x + 80y = T
@lhmaths: Lesley Hall
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
@lhmaths: Lesley Hall
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
@lhmaths: Lesley Hall
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
@lhmaths: Lesley Hall
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
@lhmaths: Lesley Hall
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
@lhmaths: Lesley Hall
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)
@lhmaths: Lesley Hall
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