The average change will be the difference in elevation over the difference in mile markers. Randy’s elevation changed from 6220 feet to 8390 feet, which is a difference of

8390-6220=2170 feet. He started tracking at mile markers 6 to mile markers 13, which is a difference of

13-6=7 miles markers. The average change in elevation is 2170 feet / 7 mile markers = 310 feet per mile marker.

8 0

3 years ago

what is the solution to the system of equations? y = 2x – 3.5 x – 2y = –14 (–7, 3.5) (3.5, –7) (7, 10.5) (10.5, 7)

AnnyKZ [126]

we have the system of equations

$y=2x-3.5$ --------> equation $1$

$x-2y=-14$ --------> equation $2$

Multiply by $2$ equation $1$

$2y=4x-7$ --------> equation $3$

Adds equation $2$ and equation $3$

$x-2y=-14 \\ 2y=4x-7\\ --------\\ x=-14+4x-7\\ 4x-x=14+7\\ 3x=21\\ x=7$

Find the value of y

$y=2x-3.5$

$y=2*7-3.5$

$y=10.5$

the solution of the system is the point $(7,10.5)$

therefore

the answer is

$(7,10.5)$

8 0

4 years ago

Read 2 more answers

Which of the numbers below are whole numbers? Check all that apply.

horrorfan [7]

Whole numbers have no decimal place so answer : B D F - because they have no decimal place.

Hope this helps

4 0

3 years ago