Please help me I’m so lost

Arc length = 9.42 cm

Step-by-step explanation:

First you need the circumference of the circle

r = 6

C = 2* pi * r

C = 2 * 3.14 * 6 = 37.68

To find the length of the arc, we need to know the central angle.  IN this case it is 90 degrees (notice the right angle of the triangle).

To find the length of the arc Arc length = (central angle in degrees/360) * C

Arc length = 90/360 * 37.68

Arc length = 9.42 cm

answer: can and shows the work

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".