A drop of water falls from a window ledge 100 feet above the ground. The solution to the equation 100 - 16t2 = 0 gives t, the number of seconds it takes for the drop to reach the
ground. How long does it take the drop to reach the ground?

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".

70,000 + 6,000 + 800 + 30

step-by-step explanation:

answer: -8.2562234e+13

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract