NEED HELP ASAP WORTH LOTS OF POINTS

Answer: 2.6
Step-by-step explanation:
PQ = QR (because it’s a rhombus), so
9b - 5 = 3b - 0.8
b = 0.7
And RS = PQ (again because rhombus), so RS = 9b - 5 = 1.3. Since RT is twice RS, we have
RT = 2(1.3) = 2.6.
Statement:
PQRS is a rhombus with PQ = (9b - 5) and QR = (3b - 0.8) meters. S is the midpoint of RT.
To find out:
The length of RT.
Solution:
Answer:
RT = 2.6 meters
Hope you could understand.
If you have any query, feel free to ask.