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

$n^2\times7-3$

at n=3.

First, we compute the square of 3:

$\begin{gathered} 3^2\times7-3, \\ 9\times7-3. \end{gathered}$

Now, multiplying by 7, we get:

$63-3.$

Finally, subtracting 3, we get:

$60.$

Answer:

$60.$