QQuestionMathematics
QuestionMathematics
Enter the value of $3 x$ when $x= 4$. Then decide if 4 is a solution of the inequality.
| $x$ | 3 | 4 |
| --- | --- | --- |
| $3 x$ | 9 | |
| $3 x \geq 127$ | No | 7 |
Solutions of $3 x \geq 12$
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Answer
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Step 1:: To find the value of the expression 3x when x = 4, substitute
3x = 3 \times 4 = \boxed{12}
x = 4 into the expression.
Step 2:: Check if the solution 4 is a solution of the inequality 3x ≥ 12.
12 \geq 12
To do this, substitute x = 4 into the inequality. Substitute x = 4: Calculate: Since 12 is greater than or equal to 12, x = 4 is a solution of the inequality.
Step 3:: Enter the value of 3x when x = 4 in the table.
| x | 3 | 4 | |-------|----|-----| | 3x | 9 | 12 | | 3x ≥ 12 | No | Yes |
Final Answer
- The value of 3x when x = 4 is 12. - 4 is a solution of the inequality 3x ≥ 12.
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