4x-y
x= 5
y= 6
replace in the ecuation above:
4•5-6= 20-6= 14
Answer:
or 
Step-by-step explanation:
The surface area of a sphere is:

Where r is the radius of the sphere
In this case we know that 
So

We solve the equation for r

Now we know the radius of the sphere.
The volume of a sphere is:

We substitute the value of the radius in the formula


Rate of fill-up = 1/44 = 1/44 * 77/77 = 77/3388
Rate of emptying = 1/77 = 1/77 * 44/44 =44/3388
Combined Rate of Fill-up = 77/3388 - 44/3388 = 33/3388 = 3/308
Time for combined fill-up = 308/3 = 102.6667 hours = 102 hours and 40 minutes
Answer:
9x+7y+13
Step-by-step explanation:
add all the x's, y's, and no exponents together