How many degrees has abc been rotated counterclockwise about the
origin?

D. 90°

Step-by-step explanation:

When rotating you move the object clockwise.

If you rotate about the origin you are rotating around the point (0,0)

A is point (2,5) and A' is (5,-2)

If you were to make a line from (0,0) to (2,0) and another line from (2,0) to (2, 5) you would have a backwards 'L' shape. When rotating that L shape you can see that shape A'B'C' has been rotated 90°.

D. 90 degrees

Step-by-step explanation:

I just took the test

-2 is the right

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58