Answer:The average rate of change between two input values is the total change of the function values (output values) divided by the change in the input values.
Step-by-step explanation:
First you need to get x on one side of the equation and to do that subtract 2a from both sides.
28 + 2a = 5a + 7
-2a -2a
28=3a+7
Then we need to get a alone by subtracting 7 on both sides.
28=3a+7
-7 -7
21=3a
Finally divide each side by 3 and you should get a = 7. Hope this helps!
5 times 5 is 25 so all you have to do is subtract two from that.
Your answer is 23.
