Help plz?????????????????????????

Because you know two sides of each triangle and they are the same triangle just the small triangle is a ratio smaller put the sides into a fraction and set them equal

Step-by-step explanation:

15 / 4x  = 12 / 3x+1    then cross multiply

15(3x+1) = 12 ( 4x)

45x+15 = 48x

15 = 3x

5 = x

this is a tricky problem

The right answer is x=5

Step-by-step explanation:

I know this is really late but here you go I hope you got the right answer.

Step-by-step explanation:

If a media research company increased the size of their random samples from 3,500 to 5,000, to get the percentage margin error, we will follow the steps;

Initial sample size = 3500

Final sample size = 5000

margin error = Final sample size - initial sample size

Margin error = 5000-3500

Margin error = 1500

%margin error = Margin error/Initial sample size * 100%

%margin error = 1500/3500 * 100%

%margin error = 3/7 * 100%

%margin error = 300/7

%margin error = 42.86%

This means that they improved their margin by 42.9% (to the nearest tenth)