QUESTION IMAGE
Question
ear equations and inequalities
sara wants to find the input value that produces the same output for the functions represented by the tables
$f(x)=-0.5x + 2$
| $x$ | $f(x)$ |
|---|---|
| -2 | 3 |
| -1 | 2.5 |
| 0 | 2 |
| 1 | 1.5 |
| 2 | 1 |
| 3 | 0.5 |
$g(x)=2x - 3$
| $x$ | $g(x)$ |
|---|---|
| -2 | |
| -1 | |
| 0 | |
| 1 | |
| 2 | |
| 3 |
what is the input value that produces the same output value in both charts?
-1
2
1
-2
Step1: Set functions equal
Set $f(x) = g(x)$:
$$-0.5x + 2 = 2x - 3$$
Step2: Isolate x terms
Add $0.5x$ to both sides:
$$2 = 2.5x - 3$$
Step3: Isolate constant terms
Add 3 to both sides:
$$5 = 2.5x$$
Step4: Solve for x
Divide by 2.5:
$$x = \frac{5}{2.5} = 2$$
Step5: Verify with tables
For $x=2$, $f(2)=-0.5(2)+2=1$, $g(2)=2(2)-3=1$. Outputs match.
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