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Samantha93
@Samantha93
May 2019
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Bonjour, j'ai besoin d'aide de votre part svp !
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Verified answer
Bonjour,
3) f(x) = 1,8x+32
f(10) remplace x par 10, calcule
f(40) remplace x par 40, calcule
4) TF = TC*1,8+32
TC = (TF-32)/1,8
soit x la T cherchée
1,8x+32 = (1,8x-32)/1,8
1,8(1,8x+32) = x-32
3,24x+57,6 = x-32
3,24x-x = -32-57,6
2,24x = -89,60
x = -40
⇒
-40 °C et -40.0 °F
0 votes
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Samantha93
Merci beaucoup
Samantha93
Tu peux me t'expliquer la 4
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Bonjour, pouvez vous m aider c t assez simple! C de la physique chimie de 2nd
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Verified answer
Bonjour,3) f(x) = 1,8x+32
f(10) remplace x par 10, calcule
f(40) remplace x par 40, calcule
4) TF = TC*1,8+32
TC = (TF-32)/1,8
soit x la T cherchée
1,8x+32 = (1,8x-32)/1,8
1,8(1,8x+32) = x-32
3,24x+57,6 = x-32
3,24x-x = -32-57,6
2,24x = -89,60
x = -40
⇒-40 °C et -40.0 °F