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The product of 18 and a number is greater than 2. Write the mathematical expression for the given statement and solve it.

A. [tex]\(18x \ \textless \ 2; x \ \textgreater \ \frac{1}{8}\)[/tex]

B. [tex]\(18x \ \textless \ 2; x \ \textless \ \frac{1}{9}\)[/tex]

C. [tex]\(18x \ \textgreater \ 2; x \ \textgreater \ \frac{1}{9}\)[/tex]

D. [tex]\(18x \ \textgreater \ 2; x \ \textgreater \ \frac{1}{2}\)[/tex]

Sagot :

To address the given statement "The product of 18 and a number is greater than 2," we first need to write it as a mathematical expression and then solve for the number.

1. Step 1: Write the mathematical expression:

The statement "The product of 18 and a number" can be represented as [tex]\(18 \cdot x\)[/tex], where [tex]\(x\)[/tex] is the unknown number.

The phrase "is greater than 2" translates to the inequality symbol [tex]\(>\)[/tex].

Hence, the mathematical expression for the given statement is:
[tex]\[ 18x > 2 \][/tex]

2. Step 2: Solve the inequality:

To solve for [tex]\(x\)[/tex], we need to isolate [tex]\(x\)[/tex] on one side of the inequality. This can be done by dividing both sides of the inequality by 18:

[tex]\[ 18x > 2 \][/tex]

[tex]\[ x > \frac{2}{18} \][/tex]

3. Step 3: Simplify the fraction:

Simplifying [tex]\(\frac{2}{18}\)[/tex] by dividing the numerator and the denominator by their greatest common divisor (which is 2), we get:

[tex]\[ x > \frac{1}{9} \][/tex]

Therefore, the complete inequality solution is:
[tex]\[ x > \frac{1}{9} \][/tex]

Among the given options, the correct one is:
\[
18 x > 2; \, x > \frac{1}{9}
\