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2 years ago

Sandra hikes 9/10 mile every 30 minutes,or 1/2 hour. How many miles does she hike each hour?

Mathematics

1 answer:

Hitman42 [59]2 years ago

5 0

9514 1404 393

Answer:

1.8 miles

Step-by-step explanation:

In the first half hour, Sandra hikes 9/10 = 0.9 miles. She hikes that distance again in the second half-hour. After an hour, Sandra has hiked ...

2 × 0.9 miles = 1.8 miles

If you like, you can consider it a "unit rate" problem. To find miles per hour, divide miles by hours:

(9/10 mi)/(1/2 h) = (9/10)(2/1) mi/h = 9/5 mi/h = 1.8 mi/h

Sandra hikes 9/5 or 1.8 miles in an hour.

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2 years ago

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Find the inverse of the function f f (x ) equals 9 x + 7

MrMuchimi

Note: Your question seems a little bit ambiguous. So, I am assuming the given function f(x)=9x+7.

Thus, I am solving based on it. It would still clear your concept.

Answer:

The inverse of f(x)=9x+7

$\frac{x-7}{9}$

Step-by-step explanation:

Given the function

$f(x)=9 x + 7$

A function g is the inverse of function f if for y=f(x), x=g(y)

Replace x with y

$x=9y+7$

solve for y

$9y=x-7$

$y=\:\frac{x-7}{9}$

Therefore,

The inverse of f(x)=9x+7 is:

$\frac{x-7}{9}$

i.e.

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2 years ago

The price of a particular stock is represented by the linear equation y=-0.91x+103.47

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To find the price of the stock after 12 weeks, you would have to plug in 12 to x

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Then, you solve:

-0.91(12) would be -10.12

Your equation will now look like this:

y = - 10.12 + 103.47

Then you add -10.12 to 103.47

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y = 92.55

After 12 weeks, the price of the stocks would be $92.55

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Sandra hikes 9/10 mile every 30 minutes,or 1/2 hour. How many miles does she hike each hour?​

Sandra hikes 9/10 mile every 30 minutes,or 1/2 hour. How many miles does she hike each hour?