Question

Mr. Cohen wrote the expression below for his 3 cousins to use to find his age. n2 x7 - 3If n represents the number of cousins, what is Mr. Cohen's age?

Answer 1

To solve the given problem, we have to evaluate the expression

`n^2*7-3`

at n=3.

First, we compute the square of 3:

`\begin{gathered} 3^2*7-3, \\ 9*7-3. \end{gathered}`

Now, multiplying by 7, we get:

`63-3.`

Finally, subtracting 3, we get:

`60.`

Answer:

`60.`