Can someone explain this question to me?
#Math Problem!
tawdry solstice
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Can someone explain this question to me?
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rose gulch
Can someone explain this question to me?
If y = kx + b, then ∆y = k∆x.
tawdry solstice
If y = kx + b, then ∆y = k∆x.
Sorry but I didn't get it, where's "b"?
rose gulch
Sorry but I didn't get it, where's "b"?
We have c = (5/9)(f - 32), so f = (9/5)c + 32. So, k = 9/5, b = 32.
tawdry solstice
Alright, then?
edgy fog
You are able to input the different values of celcius into fahrenheit.
rose gulch
We know k = 9/5 and ∆c = 20 - 10 = 10, so you can find ∆f.
tawdry solstice
You are able to input the different values of celcius into fahrenheit.
Yes, I already did that but my answer didn't match any of these choices
tawdry solstice
We know k = 9/5 and ∆c = 20 - 10 = 10, so you can find ∆f.
My answer was "50" but it didn't match with guide answer
rose gulch
My answer was "50" but it didn't match with guide answer
How did you get 50?
tawdry solstice
The correct option is there.
Place every value in its correct place then get the "f"
edgy fog
Yes, I already did that but my answer didn't match any of these choices
You can do it the long way, by deriving both values then just finding the difference
rose gulch
Place every value in its correct place then get the "f"
As I said, we have k = 9/5 and ∆c = 10. So, what is ∆f?
tawdry solstice
That what I did, 10=5/9x(X-32)
tawdry solstice
As I said, we have k = 9/5 and ∆c = 10. So, what is ∆f?
How can I get "Delta f"?
rose gulch
How can I get "Delta f"?
As I said, we have f = kc + b, so ∆f = k∆c.
edgy fog
b is neglected because its being applied to both sides, so it doesnt effect the difference between the two
tawdry solstice
As I said, we have f = kc + b, so ∆f = k∆c.
"Delta f" will equal 18, but what should I do next?
edgy fog
"Delta f" will equal 18, but what should I do next?
Thats the answer
tawdry solstice
b is neglected because its being applied to both sides, so it doesnt effect the ...
Ahaa okay!
edgy fog
the change in fahrenheit is represented by delta f
tawdry solstice
Oh wait what? Is that everything?
Sorry if I'm bothering, but why we didn't use "-35" in the equation? cuz that wasn't clear to me
edgy fog
Sorry if I'm bothering, but why we didn't use "-35" in the equation? cuz that wa...
As the -35 is going to be applied to the f equations for 20C and the 30C, it doesnt impact the final difference between the two
rose gulch
Yes. More specifically:
f = kc + b
∆f = ∆(kc + b) = k∆c + ∆b = k∆c
tawdry solstice
Yes. More specifically:
f = kc + b
∆f = ∆(kc + b) = k∆c + ∆b = k∆c
Oh yes got it! U put Delta in whole equation then with u did a subtraction in "b", it'll be 35-35 so we can neglected it, right?
rose gulch
Oh yes got it! U put Delta in whole equation then with u did a subtraction in "b...
That's right.
tawdry solstice
Thank you sm guys, u helped me tons!
I apprectiate that @rose gulch @edgy fog <33
rose gulch
You're welcome!
tawdry solstice
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