Atriangle has vertices at a (2,4) b (4,3) c (5,7) which transformation would produce an image with vertices a' (-2,-4) b' (4,-3) c' (-5,-7) does this reflect over y axis or x axis or rotate 180 or 90 degrees

180° rotation  

Step-by-step explanation:

The triangle and its image are shown below.

The image is formed by a 180° rotation about the origin, every coordinate is inverted, that is, (x, y) ⟶ (-x, -y).

It is not formed by a 90° rotation or by a reflection across either axis.

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24