The answer is c because all you are doing here is subbing the variable r for 5b.
Its line 1
if we expand the second and third expressions they come back to the first.
The last one is called the vertex form of a parabola
I think the answer should be 12.
Answer:
yes yes no
Step-by-step explanation:
The answer would be 13.9 kg of gravel used per square meter
