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On any given day, the number of users, [tex]u[/tex], that access a certain website can be represented by the inequality [tex]|125 - u| \leq 30[/tex]. Which of the following represents the range of users that access the website each day?

A. [tex]u \geq 95[/tex] or [tex]u \leq 155[/tex]

B. [tex]95 \geq u \geq 155[/tex]

C. [tex]u \leq 95[/tex] or [tex]u \geq 155[/tex]

D. [tex]95 \leq u \leq 155[/tex]


Sagot :

To find the range of users that access the website each day, we need to solve the inequality [tex]\( |125 - u| \leq 30 \)[/tex].

The absolute value inequality [tex]\( |125 - u| \leq 30 \)[/tex] can be split into two separate inequalities:
1. [tex]\( 125 - u \leq 30 \)[/tex]
2. [tex]\( 125 - u \geq -30 \)[/tex]

Let's solve each inequality separately.

### Solving the first inequality: [tex]\( 125 - u \leq 30 \)[/tex]
1. Subtract 125 from both sides:
[tex]\[ -u \leq 30 - 125 \][/tex]
2. Simplify the right side:
[tex]\[ -u \leq -95 \][/tex]
3. Multiply both sides by -1 (note that this reverses the inequality):
[tex]\[ u \geq 95 \][/tex]

### Solving the second inequality: [tex]\( 125 - u \geq -30 \)[/tex]
1. Subtract 125 from both sides:
[tex]\[ -u \geq -30 - 125 \][/tex]
2. Simplify the right side:
[tex]\[ -u \geq -155 \][/tex]
3. Multiply both sides by -1 (again, this reverses the inequality):
[tex]\[ u \leq 155 \][/tex]

### Combining both inequalities:

Putting these together, we have:
[tex]\[ 95 \leq u \leq 155 \][/tex]

So, the range of users [tex]\( u \)[/tex] that access the website each day is represented by the interval [tex]\( 95 \leq u \leq 155 \)[/tex].

Therefore, the correct answer is:
[tex]\[ 95 \leq u \leq 155 \][/tex]