2 (6) - 3 (-3) , 12 - -9 , 12 + 9 , 21
You can get 3 refills.
First you subtract $4.50-$1.65 which equals $2.85. Then you find out how many times 95¢ can go into that. It goes in 3 times so you can get 3 refills.
1) find the corresponding y values for when x = 0 and when x = 4,
when x = 0, y = 4
when x = 4, y = 4
the coordinates are (0,4) and (4,4)
2) to calculate the average rate of change, find the slope of the two points:
(0,4) (4,4)
(change in y) 4 - 4 = 0
(change in x) 4 - 0 = 4
0/4 = 0
the average rate of change is 0!
5x+2x−6=−2x+2
7x−6=−2x+2
7x=−2x+2+6
7x=−2x+8
7x+2x=8
9x=8
x=8/9
Hope this helps, have a blessed day! :-)