Human civilization, at least since the time of ancient egypt, is on the order of 5000 years old. the age of the earth is on the order of 5 billion years. suppose we use the length of a football field, or about 100 meters, as a timeline to represent the age of the earth. if we put the birth of the earth at the start of the timeline, how far from the start of that line would human civilization be?

109 trust me

step-by-step explanation:

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".