Answer:
C. -61
Step-by-step explanation:
By the definition,
![(f\circ g)(x)=f(g(x))](https://tex.z-dn.net/?f=%28f%5Ccirc%20g%29%28x%29%3Df%28g%28x%29%29)
If
![f(x)=4x+7\\ \\g(x)=3x-5,](https://tex.z-dn.net/?f=f%28x%29%3D4x%2B7%5C%5C%20%5C%5Cg%28x%29%3D3x-5%2C)
then
![f(g(x))=f(3x-5)=4\cdot (3x-5)+7=12x-20+7=12x-13](https://tex.z-dn.net/?f=f%28g%28x%29%29%3Df%283x-5%29%3D4%5Ccdot%20%283x-5%29%2B7%3D12x-20%2B7%3D12x-13)
Thus,
![f(g(-4))=12\cdot (-4)-13=-48-13=-61](https://tex.z-dn.net/?f=f%28g%28-4%29%29%3D12%5Ccdot%20%28-4%29-13%3D-48-13%3D-61)
Jean and Jonathans' age illustrate arithmetic sum, and the sum of their ages in three years time is x + y + 6
<h3>How to determine the sum of their ages?</h3>
Currently, their ages are:
Jean = x
Jonathan = y
In 3 years, their ages would be:
Jean = x + 3
Jonathan = y + 3
So, the sum of their ages is:
Sum = x + 3 + y + 3
Evaluate
Sum = x + y + 6
Hence, the sum of their ages in three years time is x + y + 6
Read more about arithmetic sum at:
brainly.com/question/6561461
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Answer:
x=32
Step-by-step explanation:
you have to solve by taking the interior angle of polygon