Foundation June 2019 Paper 2 Q7
7.
(a)
Shay has \(b\) books.
(i) Wilma has 5 fewer books than Shay.
Write an expression to show the number of books that Wilma has. [1]
Write an expression to show the number of books that Wilma has. [1]
(ii) Ellie has 3 times as many books as Wilma.
Write an expression to show the number of books that Ellie has. [1]
Write an expression to show the number of books that Ellie has. [1]
(b)
Shay has written this statement in his maths homework.
\(5x + 3y = 8xy\)
Is Shay correct?
Yes ☐ No ☐
Explain how you decide. [1]
(c) Find the value of \(15x\) when \(x = -23\). [1]
| Scheme | Marks | Comments |
|---|---|---|
| (i) \(b - 5\) | B1 | |
| (ii) \(3(b - 5)\) or \(3b - 15\) ISW | B1 | FT ‘their \((b - 5)\)’ if of equivalent difficulty |
| Scheme | Marks | Comments |
|---|---|---|
| Indicates ‘No’ AND explains that e.g. ‘you can only add like terms’, or equivalent. | E1 | Allow e.g. ‘you cannot add different letters’ |
| Scheme | Marks | Comments |
|---|---|---|
| (15 x -23 =) -345 | B1 | CAO |
| (4) |