employee (person_name, street, city) works (person_name, company_name, salary) company (company_name, city) manages(person_name, manager_name) Give an expression in relational algebra to express each of the following queries: Find the names of all employees who live in the city "Brooklyn". Find the names and cities of residence of all employees who earn a salary of at least $50,000. Find the names of all employees who work for the company "Fedco" and earn a salary of at least $50,000. Find the names and cities of residence of all employees who work for a company located in the city "Brooklyn". Find the names of employees who live in the city Brooklyn or in the city Hartford.

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

faster, im not sure why but i know it is faster

idk idk idk idk idk

step-by-step explanation: