Rande 36 La répartition de la durée des films à l'affiche
un samedi, dans un complexe cinématographique,
est représentée ci-dessous.
Effectif
5
4
3
N
de
1
et
u.
0+
80
90 100 110 120 130 140 150
Durée (en min)
n
1. Eddy affirme : «La moitié des films durent au moins
1 h et demie mais moins de 2 h. >>
A-t-il raison ? Justifier.
2.a. Réaliser un tableau en regroupant ces durées par
classes d'amplitude 20 min (80 < d < 100; ...).
b. Réaliser un histogramme pour représenter cette
nouvelle répartition.
c. Comparer ces deux histogrammes.​

Step-by-step explanation:

20min(80<d<10;...).

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)

both triangles are similar because 2 is just smaller than the big one 1 is similar because they are facing different way's but are similar to each other

step-by-step explanation: