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anonymous
 one year ago
Herlp Mer Irn Marth!!!
anonymous
 one year ago
Herlp Mer Irn Marth!!!

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Use the functions f(x) = 5x − 12 and g(x) = 11x + 2 to complete the function operations listed below. Part A: Find (f + g)(x). Show your work. (3 points) Part B: Find (f ⋅ g)(x). Show your work. (3 points) Part C: Find f[g(x)]. Show your work. (4 points)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@emmigrace222 @welshfella @Wxlfz @campbell_st @mathstudent55 @Michele_Laino

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0A just add 5x  12 and 11x + 2

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0B 5x  12  (11x + 2) be careful of the signs when you deal with the parentheses

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Part A: (f + g)(x) = 16x  10 Add x Terms: (f + g)(x) = 11x + 5x = 16x Add Regular Terms: (f + g)(x) = 12 + 2 = 10 Solution: (f + g)(x) = 16x  10

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So, part b I just multiply them? @campbell_st ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Part A: (f * g)(x) = 16x  10 Multiply x Terms: (f * g)(x) = 11x * 5x = 55x Multiply Regular Terms: (f * g)(x) = 12 * 2 = 24 Solution: (f + g)(x) = 55x  24

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What is C then @welshfella ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0your first post where you worked out f + g was correct A is 16x  10

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0Oh part B is multiplying Sorry i misread the question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok, cool. So, what is Part C?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0(f ⋅ g)(x) = (5x 12)(11x + 2) = 5x(11x + 2)  12(11x + 2) = 55x^2 + 10x  132x  24 = 55x^2  122x  24

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0C you replace the x in f(x) by g(x) then simplify dw:1438287486460:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0f(g(x)) = 5 (11x + 2)  12 simplify

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Part C: f[g(x)] = 55x^2  122x  24 Group Into Two: f[g(x)] = (5x 12)(11x + 2) = Replace f(x) and g(x): f[g(x)] = 5x(11x + 2)  12(11x + 2) Simplify: f[g(x)] = 55x^2 + 10x  132x  24 Solution: f[g(x)] = 55x^2  122x  24
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