anonymous
  • anonymous
Someone please help , how do you solve this ? The function f(x) = 1.50x + 12.50 relates how much Kelsey pays for digital service, f(x), to the number of movies, x, she streams in a month. What is the value and meaning of f(18)? $27.00; this is the amount Kelsey pays for 18 months of service $27.00; this is the amount Kelsey pays for 18 movies in 1 month $39.50; this is the amount Kelsey pays for 18 months of service $39.50; this is the amount Kelsey pays for 18 movies in 1 month
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
the x intercept is the value of x when y = 0 and y intecept is value of y when x = 0 so to find the x intercept solve for x :- 3x - 2(0) = 18 3x = 18 x = ?
anonymous
  • anonymous
Hey sorry that was the wrong question because it dosnt make sense it's ... The function f(x) = 1.50x + 12.50 relates how much Kelsey pays for digital service, f(x), to the number of movies, x, she streams in a month. What is the value and meaning of f(18)?
TheSmartOne
  • TheSmartOne
That's that same question though...?

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anonymous
  • anonymous
Oh gosh nvm , and x=15
TheSmartOne
  • TheSmartOne
wrong. You are multiplying the 3 to x. So you have to divide to get rid of it: \(\sf\Large \frac{3x}{3}=\frac{18}{3}\)
anonymous
  • anonymous
x=6 then ?
TheSmartOne
  • TheSmartOne
correct
anonymous
  • anonymous
Okay but now what ? What do i do with the 6?
TheSmartOne
  • TheSmartOne
I don't know why @welshfella had you calculate the x-intercept... It is of no importance in the question :/
TheSmartOne
  • TheSmartOne
f(x) = 1.50x + 12.50 They want to know what f(18) = ? so plug in x=18 and tell me what you get :)
anonymous
  • anonymous
39.5
TheSmartOne
  • TheSmartOne
correct.
TheSmartOne
  • TheSmartOne
so what 2 answer choices can we eliminate?
anonymous
  • anonymous
A & b
TheSmartOne
  • TheSmartOne
good job and I think welshfella 's comment was for your previous question which you editted :p
anonymous
  • anonymous
Yes it was haha
TheSmartOne
  • TheSmartOne
read this line: The function f(x) = 1.50x + 12.50 relates how much Kelsey pays for digital service, f(x), to the number of movies, x, she streams in a month. what do you think would be the answer between C and D?
anonymous
  • anonymous
D
anonymous
  • anonymous
@TheSmartOne
TheSmartOne
  • TheSmartOne
correct, great job :)

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