L'aire d'une enveloppe est de 255 cm2. L'aire d'un timbre est d'environ 520 mm2.
Si tu tapisses une face d'une telle
enveloppe avec des timbres, en évitant les
recouvrements et les trous, combien te
faudra-t-il de timbres?
Arrondis le nombre de timbres à l'entier
supérieur.

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.

#12 the answer is the third option

well, because the $0.25 is an added cost depending on how many minutes, the answer would be y = 30 + 0.25x.