A photograph of a painting measures 13 units by 17 units. If the scale factor is 1/3, what is the actual size of the painting? 26 by 34
26 by 34

4.3 by 5.7
4.3 by 5.7

39 by 51
39 by 51

the size of the painting is 39 inches by 51 inches.

Step-by-step explanation:

Size of the painting: A * B

Scale factor: 1/3

Size of the photo: [1/3]A * [1/3]B

[1/3]A = 13inches => A = 13inches * 3 = 39 inches

[1/3]B = 17 inches => B = 17 inces * 3 = 51 inches.

step-by-step explanation:

what is the figure? attach a picture.