The rate of change is for every 1 week it looses 6 feet of gas
Answer:
B
Step-by-step explanation:
Although the question's print is not clear, to the best of my knowledge, as I can see, We are given that:
and 
No, we know that, by definition:


Thus, for the functions r and s which are defined for all real numbers x, the answer to the question asked is:

Answer:
X=5, Y=0
Step-by-step explanation:
-9Y +4X -20=0
-7Y+16X-80=0
1. We can multiply the first equation by 4. This will equal to -36Y +16X-80=0.
-36Y +16X -80 =0
-7Y+16X-80=0
2. We can subtract these two equations.
-36Y +16X -80 =0
-7Y+16X-80=0
We will get -29Y =0. Y=0.
3. Then we can substitute y into the first equation. -9(0) +4x-20 =0. 4x=20. x=5
X=5, Y=0
Answer:
Only the 2nd and 5th options are correct.