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brodybarnes35
 one year ago
Given the functions a(x) = 3x − 12 and b(x) = x − 9, solve a[b(x)] and select the correct answer below.
a[b(x)] = 3x2 − 21
a[b(x)] = 3x2 − 39
a[b(x)] = 3x − 21
a[b(x)] = 3x − 39
brodybarnes35
 one year ago
Given the functions a(x) = 3x − 12 and b(x) = x − 9, solve a[b(x)] and select the correct answer below. a[b(x)] = 3x2 − 21 a[b(x)] = 3x2 − 39 a[b(x)] = 3x − 21 a[b(x)] = 3x − 39

This Question is Closed

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0@Sammylemon @hero @Nnesha @Mehek14

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0please help ill medal and fan if i dont fan you already

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The easiest way to explain is with an example....say you're evaluating for x=2. Because it's asking for a(b(x)), you plug in the x value into b(x) first. Whatever answer you get, you plug that in for x in the a(x) function.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because they didn't give you a value for x, you have to plug in the entire b(x) function for every x value in the a(x) function. Once you've done that you simplify

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so it'll look like this... a(b(x))=3(x9)12

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0oh ok so next it would be 3x  27  12

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0perfect, combine like terms and you're done.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0nope...you're not solving for anything. go back to what you had before...3x2712

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.03x = 39 x = 13

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0again, not solving for anything....so when you combine like terms that's just a fancy way of saying do all addition and subtraction you can. If you have 2x+3x12 and you combine terms it would be 5x12.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 3x2712...you can combine the 27 and the 12

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0again that would be 39

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yup...put it with the first part of the equation and you have a(b(x))=3x39

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's it...in your original question it's the last choice in the list.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it's not set equal to anything so x is just a variable...it could be anything.

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0YAYAYA YOUR AMAZING THANKS can you help with a couple more???

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm a math/science teacher so I should know what I'm talking about :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and sure, I have a little more time.
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