Write an algebraic expression for the following.

(a)
Subtract 15 from $k$ .

Ans: (a)___
(b)
Jane typed 45 words in $n$ minutes. Express the number of words she can type in 1 minute in terms of $n$ .

Ans: (b)___

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Worked solution

1. Translate the English phrase into an algebraic expression

The phrase 'Subtract 15 from $k$ ' means we start with $k$ and take away 15. This is written as $k - 15$ .

Answer

$k - 15$

1. Formulate the algebraic expression for the typing rate per minute

$\text{Words per minute} = \frac{\text{Total words}}{\text{Total time}} = \frac{45}{n}$

Answer

$\frac{45}{n}$

AI analysis — may contain mistakes.

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