let f(x)=x^2-8 and g(x)=7-x. perform the composition or operation indicated.

(fg)(-7)
asked Oct 10, 2017 in Algebra 1 Answers by anonymous

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

fg usually means f(g(x)) which in this case is (g(x))²−8. So fg(-7) is (g(-7))²−8.

Now g(-7) is 7-(-7)=14, so (g(-7))²−8 is 14²-8=196-8=188.
answered Oct 12, 2017 by Rod Top Rated User (546,340 points)

Related questions

1 answer
1 answer
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
81,131 questions
85,210 answers
2,143 comments
68,641 users