Please answer these three questions asap

1) Yes, they are congruent

Congruent means the measure of both angles is the same

2) Yes.

In reflection, only the coordinates change.

The lengths of the sides and angles are same as of the pre image

3) ST

side BC corresponds to side ST.

RSTV is just a translation of ABCD. The orientation doesn't change

B

Step-by-step explanation:

This is a neat question

f(x) - g(x) = 2x           Add g(x) to both sides

f(x) = g(x) + 2x

Now you need the right hand side to have 20 added to g(x).

2x must = 20

2x = 20                    Divide by 2

x = 20/2

x = 10

So the answer must be x = 10