J'arrive pas finir cet rapide exercice, pouvez vous m'aidez ?
"cet exercice est un questionnaire à choix multiples, pour chaque questions choisir la bonne réponse en justifiant votre choix ."
soit a(2; -1) et b (-1; -1), la droite (ab):
a) n'a pas d'équations ;
b) a pour équation x=-1;
c) a pour équation y=-1;
d) n'a pas de coefficient directeur.

bjr

A(2;-1) B (-1,-1)

A et B ont la même ordonnée -1 => y = -1

Explications étape par étape

Bonjour

Soit A(2;-1) et B (-1;-1), la droite (AB):

a) n'a pas d'équations ;

b) a pour équation x=-1;

c) a pour équation y=-1;

d) n'a pas de coefficient directeur.

Coefficient directeur :

a = (yB - yA)/(xB - xA)

a = (-1 +1)/(-1 - 2)

a = 0/-3

a = 0

Pas de coefficient directeur réponse d

y = ax + b

-1 = 2 * 0 + b

b = -1

Donc y = -1 réponse c)

Bonjour ^^,

8) In the US from 1916 to 1970, there was a “Great Migration”: African-Americans massively immigrated from the South to the North. Why?

a) Because they did not have the right to Vote in the South and they wanted to create a new multicultural American identity.

b) Because of how badly they were treated in the South (unequal salary, discrimination, poor schooling, etc.) and to find better jobs in new cities in the North.

c) Because they did not want to be slaves anymore in the South and to work in plantations, working outside all day long without a salary.

d) Because they did not like the countryside life anymore and thought the cities

looked cool ... Mdr

9) What popular design style in art and architecture blossomed in popularity in 1920s

to convey the idea of luxury and glamour?

a) pop art

b) impressionism

c) avant-garde

d) art deco

10) What article of men’s clothing was the most obvious indicator of economic

status in the 20s?

a) neck ties

b) vest and suits

c) shoes

d) hats

e) belts

11) The “Harlem Renaissance” was an important African American cultural

movement born in Harlem, New York. Who is often regarded as the father of the “Harlem Renaissance”?

a) Langston Hughes a famous Black poet and writer who was one of the leader of the

Harlem Renaissance.

b) Alain Locke, a famous Black author who wrote an Anthology of works by African

American artists.

c) W. E. B. Du Bois, a famous Black sociologist, socialist, historian and Civil Rights

activist who was of favor of African-American artistic creativity.

d) Louis Armstrong, a famous Black trumpeter, composer, vocalist and actor who

was one of the most influential figures in jazz music.

Bonjour,

1)

b) Because of how badly they were treated in the South (unequal salary,  discrimination, poor schooling, etc.) and to find better jobs in new cities in the North.

2)

d) art deco

3)

d) hats

4)

b) Alain Locke, a famous Black author who wrote an Anthology of works by African  American artists.

Voila, j'espere que sa vous aides❤

bonjour

nutriments

dioxygène

CO2

urée

vessie

reins

réponse :

c'est 2cm

explications étape par étape

la longueur du cotes d'un carre de perimetre 8cm est:

8: 4=2 car un carre a 4 cotes