Answer:
(x - 3)(x + 7)
Step-by-step explanation:
x^2 + 4x - 21
=> x^2 + 7x - 3x - 21
=> x(x + 7) -3(x + 7)
=> (x + 7)(x - 3)
Answer:
2.44 pints of white
Step-by-step explanation:
Since
(density = mass/volume), we can get the mass/weight of the liquid by integrating the density
over the interior of the tank. This is done with the integral

which is more readily computed in cylindrical coordinates as

Step-by-step explanation:
Dave + 6 friends = 7 friends in total
84 ÷ 7 = 12
Each friend paid $12