Answer:
A. Total fuel, in cubic feet, supplied by the two tankers in one trip.
Step-by-step explanation:
Answer:
1) 
2) After 8 minutes delivering fuel the tanks will have 121 gallons of fuel
Step-by-step explanation:
1) For generating the equation we have to take into account that in the tanks there is a initial volume of fuel that corresponds to 75 gallons, as it is stated that tank one is half full. As the capacity for tank 1 is of 150 gallons, half of the tank equals to:

Now we have to convert the rate of delivery that is expressed as a mixed number to an improper fraction so:

Then the pumping rate is of 23/4 gallons per minute, to get how many gallons are in the tank we just need to multiply this rate by the time in minutes, and as there is an initial volume we have to add it, so we have the following equation:

2) To know how much fuel is in the tank after 8 minutes we have to replace this time in the previous equation so we have

After 8 minutes delivering fuel the tanks will have 121 gallons of fuel
Answer:
(5,1)
Step-by-step explanation:
Given :

Solution :
Equation 1 : y=x-4
Equation 2 : y = -x+6
We will use substitution method
Putting the value of y from equation 1 in equation 2
⇒
⇒
⇒
⇒
⇒
Now substituting value of x in equation 1 to get value of y
⇒
⇒
⇒
Thus the solution of given system of equations is (5,1)
We have also solved it by graphing the equations
You can refer the attached figure.
Answer:
The circumference is approximately 125.66.
Step-by-step explanation:
The formula for circumference is 2 x 3.14(r). Radius (or r) in this case is equal to 20 since the diameter is two times the length of the radius. 40/2 = 20.
2 x 3.14(20) ≈ 125.66