The most right answer would be the one you think because I think that’s right 4x4
Answer:


x(0)=20,y(0)=5
Step-by-step explanation:
We are given that
Tank A contains water=80 gallons
x(0)=20,y(0)=5
Tank B contains water=30 gallons
Rate=4 gallon/min
Concentration of salt is pumped into tank=0.5 pound /gallon of water
Solution pumped from tank A to tank B at the rate=6 gallons/min
Solution pumped from tank B to tank A at the rate=2gallon/min
Solution from tank B is pumped out of the system at the rate=4 gallon/min
We have to find the DE at time t
For x
Rate in=
Rate in=
Rate out=
Rate out=3x/40[/tex]
Rate in-Rate out


For y
Rate in=
Rate in=3/40x
Rate out=
Rate out=y/5
Rate in-Rate out

Answer:

Step-by-step explanation:
In the attachment!
Answer:
20, 31, 44, 59
Step-by-step explanation:
find difference between
-4 and -1 is 3
-1 and 4 is 5
4 and 11 is 7
next term: 11+9=20
next term: 20+11=31
next term: 31+13=44
next term: 44+15=59