172k views
1 vote
Solve for xx and graph the solution on the number line below.

4, x, plus, 7, is greater than or equal to, minus, 13, and, 15, is greater than or equal to, 4, x, plus, 7
4x+7≥−13 and 15≥4x+7

User Jball
by
8.0k points

1 Answer

4 votes

Answer:

Explanation:

Let's solve the inequality and then graph the solution on the number line.

Starting with the inequality:

\[4x + 7 \geq -13\]

Subtract 7 from both sides:

\[4x \geq -20\]

Divide both sides by 4 (note: since 4 is positive, we don't need to flip the inequality sign):

\[x \geq -5\]

Now, the second part of the inequality:

\[15 \geq 4x + 7\]

Subtract 7 from both sides:

\[8 \geq 4x\]

Divide both sides by 4:

\[2 \geq x\]

So, the solution to the system of inequalities is \(x \geq -5\) and \(2 \geq x\).

Now, let's graph this on the number line:

```

<--------[=======]------------------|

-5 2

```

The square bracket at -5 indicates that -5 is included in the solution (greater than or equal to), and the parenthesis at 2 indicates that 2 is not included in the solution (greater than, not equal to). The shaded region represents the values of \(x\) that satisfy the inequalities.

User Dennis Kassel
by
7.2k points