The quotient of a number, [tex]$z$[/tex], and 21 is 42.

Which equation and value of [tex]$z$[/tex] represent this relationship?

A. [tex]\frac{z}{21} = 42 \Rightarrow z = 882[/tex]
B. [tex]21z = 42 \Rightarrow z = 2[/tex]
C. [tex]\frac{1}{21}z = 42 \Rightarrow z = 882[/tex]



Answer :

Let's break down the problem step by step.

The problem states that the quotient of a number [tex]\( z \)[/tex] and 21 is 42. We can translate this relationship into a mathematical equation.

### Step-by-Step Explanation:

1. Understanding the Quotient:
- The quotient of a number [tex]\( z \)[/tex] and 21 means [tex]\( \frac{z}{21} \)[/tex].

2. Setting Up the Equation:
- According to the problem, [tex]\( \frac{z}{21} = 42 \)[/tex].

3. Solving for [tex]\( z \)[/tex]:
- To find the value of [tex]\( z \)[/tex], multiply both sides of the equation by 21 (to get rid of the fraction):
[tex]\[ \frac{z}{21} \cdot 21 = 42 \cdot 21 \][/tex]
- Simplifying the left-hand side:
[tex]\[ z = 42 \cdot 21 \][/tex]

4. Calculating the Value:
- Now we calculate:
[tex]\[ z = 42 \cdot 21 = 882 \][/tex]

Therefore, the equation representing the relationship is [tex]\( \frac{z}{21} = 42 \)[/tex], and solving this gives [tex]\( z = 882 \)[/tex].

So the appropriate equation and value of [tex]\( z \)[/tex] are shown as:
[tex]\[ 21z = 42 \quad \rightarrow \quad z = 882 \][/tex]