Considere as seguintes afirmações sobre o conjunto U = {0,1,2,3,4,5,6,7,8,9}:

I) ∅ ∈ U e n(U) = 10.

II) ∅ ⊂ U e n(U) = 10.

III) 5 ∈ U e {5} ⊂ U.

IV) {0,1,2,5} ∩ {5} = 5.

Pode-se dizer, então, que é(são) verdadeira(s):

a) apenas I e III.

b) apenas II e IV.

c) apenas II e III.

d) apenas IV.

e) todas as afirmações.

Step-by-step explanation:

Given that the set U = {0,1,2,3,4,5,6,7,8,9}

Given statements are I) ∅ ∈ U and n (U) = 10.

II) ∅ ⊂ U and n (U) = 10.  

III) 5 ∈ U and {5} ⊂ U.  

IV) {0,1,2,5} ∩ {5} = 5.

A universal set is the collection of all elements in a particular manner.

All other sets are subsets of the universal set, the universal set  is denoted by  U.

Hence I) ∅ ∈ U and n (U) = 10.

II) ∅ ⊂ U and n (U) = 10.  

III) 5 ∈ U and {5} ⊂ U.  

IV) {0,1,2,5} ∩ {5} = 5.  are all true by the definition of Universal set.

i think it is 70

step-by-step explanation:

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3