Bonjour je dois faire le l’exercice 14 Juste je dois faire que le petit a si vous pouvez m’aider ça serait cool merci

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Can someone me with the property questions for 12 13 and 14 plz