Dados os coeficientes a, b e c escreva as equações do 2o grau corretamente: a) a= 2 b= -2 c= 3
b) a= 12 b=15 c= 0
c) a= 0 b= 1 c= 0
d) a= 3 b= -4 c= -9
e) a= 8 b= -8 c= 13
f) a= 11 b= 55 c= -13
g) a= 16 b= 17 c= -2
h) a= 3 b= 0 c= 0

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Evan walked 5/8 mile to his friends house. then together they walked 7/12 mile to the movie theatre. which pair of fraction can evan use to find how far he walked in all?

Nour and rana are shopping for a christmas tree. they are deciding between 2 22 different types of trees (real and fake) and 4 44 colors for the ornaments (white, silver, gold, and purple). they each created a display to represent the sample space of randomly picking a type of tree and a color for the ornaments. whose display correctly represents the sample space?