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Write and then evaluate the expression. Then, check all that apply.

Six times the sum of a number cubed and two; evaluate when [tex]$n = 3$[/tex].

\begin{tabular}{|c|c|}
\hline
Key Words & Replace With \\
\hline
six & 6 \\
\hline
times & [tex]$\times$[/tex] \\
\hline
the sum of & [tex]$(+)$[/tex] \\
\hline
a number & [tex]$n$[/tex] \\
\hline
cubed & exponent of 3 \\
\hline
two & 2 \\
\hline
\end{tabular}

The expression is written as [tex]$6 \left( n^3 + 2 \right)$[/tex].

Evaluate by substituting 3 in for the variable.

Simplify by using order of operations.

The value of the expression is:

A. 174
B. 66
C. 56


Sagot :

Let's break down the question step-by-step and evaluate the expression given the number [tex]\( n = 3 \)[/tex].

Step 1: Understand key words and their replacements
- Six becomes [tex]\( 6 \)[/tex]
- Times translates to multiplication, [tex]\( \times \)[/tex]
- The sum of indicates an addition operation, [tex]\( + \)[/tex]
- A number is represented by [tex]\( n \)[/tex]
- Cubed means raising the number to the power of 3, [tex]\( n^3 \)[/tex]
- Two remains as [tex]\( 2 \)[/tex]

Step 2: Form the expression
Using the replacements mentioned above, the expression "six times the sum of a number cubed and two" can be written mathematically.

So, we have:
[tex]\[ 6 \times (n^3 + 2) \][/tex]

Step 3: Simplify the parenthesis
Now let's substitute [tex]\( n = 3 \)[/tex] and simplify.

First, compute the sum inside the parentheses:
[tex]\[ n^3 + 2 \][/tex]
[tex]\[ 3^3 + 2 \][/tex]
[tex]\[ 27 + 2 \][/tex]
[tex]\[ 29 \][/tex]

Step 4: Multiply by 6
Next, multiply the sum by 6:
[tex]\[ 6 \times 29 \][/tex]
[tex]\[ 174 \][/tex]

Step 5: State the value of the expression
The value of the expression when [tex]\( n = 3 \)[/tex] is:
[tex]\[ \boxed{174} \][/tex]

This verifies that the statement "The value of the expression is 174" is correct. Therefore, the correct value of the expression is [tex]\( \boxed{174} \)[/tex].