Calculating rate of change from a graph

1 answer:

7 0

Answer: You can use the slope formula (y2 - y1) / (x2 - x1) to find the rate of change of a graph. Just pick 2 points on the graph and plug them in.

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I did some work but I still can't seem to find X.

Luda [366]

since ΔQRS similar to ΔQRP, then

SR/QR = QR/PR

x/12 = 12/(3.5+x)

x(3.5+x) = 12²

x² + 3.5x = 144

x² + 3.5x - 144 = 0

$x = \frac{ - 3.5 + \sqrt{ {3.5}^{2} + 4 \times 144} }{2} \\ = \frac{ - \frac{7}{2} + \sqrt{ \frac{49}{4} + 576} }{2} \\ = \frac{ - 7 + \sqrt{49 + 2304} }{4} \\ = \frac{ - 7 + \sqrt{2353} }{4}$

approximately 10.38

7 0

4 years ago

Ming spent half of her weekly allowance aying mini golf. To earn more money her parents let her wash the car for $5. What is her

Irina18 [472]

Answer:

Her weekly allowance is $8.

Step-by-step explanation:

Let the weekly allowance of Ming is $x.

If she spends half of her weekly allowance playing mini-golf and to earn more money her parents let her wash the car for $5, then the remaining amount of money that she has = $(\frac{x}{2} + 5)$ dollars.