Rachel hikes at a steady rate from a ranger station to a campground that is 20 mi away. after 2 h, she is 13 mi from the campground. after 4 h, she is 6 mi from the campground. a graph shows her distance from the campground y, in miles, after x hours. what is the slope of the graph and what does it represent?

-3.5

The distance Rachel covers per hour is 3.5 miles

Step-by-step explanation:

After 2 hours, she is 13 miles from the campground.

After 4 hours, she is 6 miles from the campground.

Let x be the number of hours, y be the number of miles from the campground, then we have two points (2,13) and (4,6).

The equation of the line passing through the points and is

Substitute:

Hence,

The slope of the line is and it represents that  the distance Rachel covers per hour is 3.5 miles.

54

step-by-step explanation:

6x9

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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