If r is the midpoint of qs, rs=2x-4, st=4x-1, and rt=8x-43, find qs

Step-by-step explanation:

Look at the picture.

We must start from domain:

   add 4 to both sides

    divide both sides by 2

and

         add 1 to both sides

         divide both sides by 4

and

           add 43 to both sides

          divide both sides by 8

From 1, 2 and 3 we have:

R is midpoint of QS. Therefore QR = RS ⇒ QS = 2(RS).

RS = 2x - 4

Put the value of x and calculate the length of RS:

Therefore

x=30

step-by-step explanation:

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