Question

write the expression. then, complete the statements. twice the difference of a number and seven
key words | replace with
twice | 2 ×
the difference of | ( - )
a number | n
seven | 7
the word \twice\ means
the words \the difference of\ indicate
the expression is written as

Explanation:

Step1: Interpret "twice"

It means multiplication by 2, represented as $2\times$.

Step2: Interpret "the difference of"

It implies subtraction, represented as $(\ - \ )$.

Step3: Let the number be $n$

We are finding the difference of $n$ and 7, which is $(n - 7)$.

Step4: Combine to form the expression

We multiply the difference $(n - 7)$ by 2, getting $2\times(n - 7)$ or simply $2(n - 7)$.

Answer:

The word "twice" means $2\times$. The words "the difference of" indicate subtraction. The expression is written as $2(n - 7)$.