Answer:

Step-by-step explanation:

We know that formula for average rate of change of a function from a to b is

Here f equals h and a =-3 b=5
h(a) = 
and
h(b) = 
h(b)-h(a) =
b-a = 5-(-3) =8
Hence average rate of change is

17\20 should be the correct answer
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Answer:
<h2>x = 20</h2>
Step-by-step explanation:
The angles 7x° and (x + 20)° are supplementary angles.
Supplementary angles add up to 180°.
Therefore we have the equation:
7x + (x + 20) = 180
7x + x + 20 = 180 <em>subtract 20 from both sides</em>
8x = 160 <em>divide both sides by 8</em>
x = 20