5(3x-1)
(x-3)(x-2)
I don't know if you want working out or an explanation? Or if it's too late, sorry.
Answer:

Step-by-step explanation:
Start by converting 5 meters to centimeters. Note 1 meter = 100 centimeters.
We can set up a unit converter:

The meters cancel out leaving us with:

The scale factor is:

Answer:
3 in
Step-by-step explanation:
Apparently, we are to assume that the height and width are proportional:
height/width = (6 in)/(8 in) = (new height)/(4 in)
Multiplying by 4 in will tell us the new height:
new height = (4 in)(6/8) = 3 in
The reduced frame will be 3 inches tall.
This solid object contains 8 sides.
The side that is facing you has a surface area:
The side exactly opposite this one has the same surface area - 2 sides with this surface area in total.
The bottom side has a surface area:

The side to your right has a surface area:

The side to your left has a surface area:

The side to your top left has a surface area:

The side beside the side to the top left has a surface area:

The side at the very top has a surface area:

Combined, the surface area is:

Therefore the answer is: C