Answer:
Step-by-step explanation:
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Answer:Average rate of change = -112
Explanation:The average rate of change =

where:
b is the upper limit = 2
f(b) = f(2) = -14(2+4)² - 8 = -512
a is the lower limit = -2
f(a) = f(-2) = -14(-2+4)² - 8 = -64
Substitute with these values in the above equation to get the average rate of change as follows:
average rate of change =

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Here is your answer. In the first bracket it's your X1 and Y1 and second bracket it's your X2 and Y2
1) 43
2) 21
step by step:
Both triangles are right triangle which means they're equal to 90.
1) 23+24+X= 90
47+x= 90
x= 90-47
X= 43
2) 30+39+X= 90
69+X= 90
X= 90-69
X= 21