4. Refer to functions f(x) = Vx+ 20 and g(x)= x² - 9 a. Find the function (x) and write its domain in interval notation. Use functions f(x) = Vx+20 and g(x)=x² -9 to answer questions b, c, and d. b. Find (fog)(5). Give exact simplified answer. Find (g·f)(-4). Give exact simplified answer. c. d. Find (f +g)(16). Give exact simplified answer.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter9: Quadratic Functions And Equations
Section9.9: Combining Functions
Problem 50HP
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4a

4.
Refer to functions f(x) = Vx+ 20 and g(x)= x² - 9
a.
Find the function
(x) and write its domain in interval notation.
Use functions f(x) = Vx+20 and g(x)=x² -9 to answer questions b, c, and d.
b. Find (fog)(5). Give exact simplified answer.
Find (g·f)(-4). Give exact simplified answer.
c.
d. Find (f +g)(16). Give exact simplified answer.
Transcribed Image Text:4. Refer to functions f(x) = Vx+ 20 and g(x)= x² - 9 a. Find the function (x) and write its domain in interval notation. Use functions f(x) = Vx+20 and g(x)=x² -9 to answer questions b, c, and d. b. Find (fog)(5). Give exact simplified answer. Find (g·f)(-4). Give exact simplified answer. c. d. Find (f +g)(16). Give exact simplified answer.
Expert Solution
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Hi there, you have mentioned 4 a. So, I have solve solved this one.

Step 2

To find the function (f/g) (x) and its domain.

 

Step 3

Given information:

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