What is the initial step in calculating the total cost of hiring a carpet cleaner?
GCSE Secondary Maths Age 13-17 - Algebra: Formula - Explained

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Mathematics
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10th - 12th Grade
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Divide the total cost by 7.8
Add 12 to the number of days
Multiply the number of days by 7.8
Subtract 12 from the total cost
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If Andy hires a carpet cleaner and the total cost is £82.20, how many days did he hire it for?
8 days
7 days
10 days
9 days
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method can be used to find the number of days Andy hired the carpet cleaner?
Only trial and improvement
Only algebraic method
Both trial and improvement and algebraic method
Neither method
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for the total cost (T) in terms of the number of days (Y) Chloe hires a carpet cleaner?
T = 12Y - 7.8
T = 12Y + 7.8
T = 7.8Y - 12
T = 7.8Y + 12
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many marks are awarded for deriving the formula T = 7.8Y + 12?
Four marks
Two marks
One mark
Three marks
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