Natalia leaned a 79-foot ladder against the side of a building. The base of the ladder is 4 feet from the base of the building. The top of the
ladder is 20 feet from the top of the building. How tall, to the nearest
tenth of a foot, is the building?

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".

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>

b. x + 1

step-by-step explanation:

i'am smart