Question

PLZ HELP FAST ASAP THANKS GUYS!!!!!!!!!!!!! ALSO WILL GIVE BRANLIEST

Answer 1

Top/side = top/side
10/6 = 5/x
Cross multiply
10x = 30
Divide both sides by 10
x = 3

Answer 2

If I understand correctly, the question is saying that the rectangles have the same proportions and wants to know the right side length of the smaller rectangle.
If this is the case, then the proportion is 5:3, with 3 being the right side length of the smaller rectangle.
This is because The original is 10:6, which is equal to 5:3.
Also, 5 is half of 10, so to find the right side length, just half the original as well, since you have to do the same to both sides. This results in lengths of 5 and 3.

Hope this helps :)