Which of the following are solutions to the inequality below? Select all that apply.



$\frac{r}{17}-5 \leq-9$


A$r=51$
B$r=-51$
C$r=-119$
D$r=-34$

Verified Answer :

  • Isolate the variable \(r\) in the inequality: \(\frac{r}{17} - 5 \leq -9\).
  • Adding 5 to both sides gives \(\frac{r}{17} \leq -4\).
  • Multiplying both sides by 17 results in \(r \leq -68\).
  • Comparing the given values to \(-68\), we find the only valid solution is \(\boxed{r = -119}\).

Explanation

  1. Understanding and Analyzing the Problem

We are given the linear inequality:
\[\frac{r}{17} - 5 \leq -9\]
We need to determine which values from the set \(\{51, -51, -119, -34\}\) satisfy this inequality. A linear inequality is an inequality that can be written in the form \(ax + b < c\) or similar. Here, we aim to isolate \(r\) to find the range of values that satisfy the condition.

  1. Solving the Inequality

To solve the inequality \(\frac{r}{17} - 5 \leq -9\), we follow these algebraic steps:

  1. First, isolate the term involving \(r\) by adding 5 to both sides of the inequality:

\[\frac{r}{17} \leq -9 + 5\]
\[\frac{r}{17} \leq -4\]

  1. Next, isolate \(r\) by multiplying both sides by 17. Since 17 is a positive number, the direction of the inequality sign remains the same:

\[r \leq -4 \times 17\]
\[r \leq -68\]
Thus, any value of \(r\) that is less than or equal to -68 is a valid solution to the original inequality.

  1. Testing Candidate Values

Now, we test each candidate value to see if it satisfies the condition \(r \leq -68\):

  • For \(r = 51\): Is \(51 \leq -68\)? No.
  • For \(r = -51\): Is \(-51 \leq -68\)? No, because \(-51 > -68\).
  • For \(r = -119\): Is \(-119 \leq -68\)? Yes, this is true.
  • For \(r = -34\): Is \(-34 \leq -68\)? No, because \(-34 > -68\).

Comparing these to the condition, we find that only \(r = -119\) satisfies the inequality.

  1. Final Answer

The value that satisfies the inequality \(\frac{r}{17} - 5 \leq -9\) is \(r = -119\). Thus, the final answer is \(\boxed{r = -119}\).

Examples

Imagine you are managing the temperature in a large storage freezer. The temperature \(r\) in a specific cooling unit must be kept at a certain level to preserve sensitive materials. Specifically, the relationship \(\frac{r}{17} - 5 \leq -9\) represents the threshold for safety. By solving this, you identify which temperature readings are within the safe range. In our case, the temperature must be \(-68\) or colder to ensure the items remain frozen, so a reading of \(-119\) degrees is a safe condition.