Lilli jogs 1/2 mile in 1/10 hour, what is lilli's rate in miles per hour?

2 answers:

6 0

If she jogs 1/2 miles in 1/10 hours, we need to find how much she jogs in 1 hour. Since the amount of time (1/10h) went up 10 times (10 * 1/10 = 1) then the distance must’ve also increased 10 times (since time and distance are proportional — the more time she jogs, the more distance she covers) and since 10 times 1/2 is 10/2, which is 5, then we can say she jogs 5 miles per hour.

VikaD [51]3 years ago

3 0

Answer:

5 mph

Step-by-step explanation:

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Find the slope of the graph of the equation at the given point. (If an answer is undefined, enter UNDEFINED.)

juin [17]

Answer:

Undefined.

Step-by-step explanation:

We want to find the slope of the graph of the equation:

$\displaystyle x^2 - y^2 = 81$

At the point (9, 0).

In other words, we want to evaluate dy/dx when x = 9 and y = 0.

Find dy/dx. We can take the derivative of both sides with respect to x:

$\displaystyle \begin{aligned} \frac{d}{dx}\left[ x^2 - y^2\right] = \frac{d}{dx}\left [ 81\right] \\ \\ 2x - 2y \frac{dy}{dx} &= 0 \\ \\ \frac{dy}{dx} = \frac{x}{y}\end{aligned}$