Bonjour j'ai trois problème d’équation qui me soûle et que j'arrive pas a faire vous pouvez m'aider s'il vous plait

1° calculer la longueur de chaque coté pour que le périmètre mesure 181 m.
ab = x
bc = 3x
ac = 2x+1

2°jean a acheté 2 cahiers identiques et une règle a 1,80€ et il a payé en tout 4,80€

a) traduire ce problème, 1 équation
b) calculer la valeur d'1 cahier
mercii en avance

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

Which inequality has a dashed boundary line when graphed ?

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.