Question

rs = 8y +4, st = 4y + 8 and rt = 15y - 9

Answer 1

You'd have to find out what Y is first.

This is like .. transitive property or something, so .. basically,

RS and ST are going to equal RT.
Soo ..

8y + 4 + 4y + 8 = 15y - 9.
Simplify.

12y +12 = 15y - 9
Add 9 on both sides.

12y + 21 = 15y

Subtract 12y from both sides.

21 = 3y
Divide 3 on both sides.

7 = y
y = 7

So ... Back to our original stuff.

RS = 8y + 4
ST = 4y + 8
and
RT = 15y - 9.

Plug in "7" fr "y".

RS = 8(7) + 4
ST = 4(7) + 8
and
RT = 15(7) - 9

There you go.

Answer 2

thank u

Answer 3

yup