Answer:
x=1
y=2
z=-1
Step-by-step explanation:
Add the first two equations: (this will be equation 4)
Multiply the first equation by 2:
Take the third equation and subtract the above equation.
Multiply that by 3:
Subtract equation 4:
For y+3z=-1, plug in values:
Plug in y and z values in first equation:
12 is equivalent to three and 36 is equivalent to 12 three goes into 12 four times and and 36 goes into 12 three times
42x + 4 = 130
42x = 130-4
42x = 126
x = 3
Answer:
c
Step-by-step explanation:
if you take 30 and divide by two you get 15 and 15. 15 divided by 3 is 5,5,5 and if you did two thirds then you would have five problems left
Answer:
Step-by-step explanation:
Given that tank has the shape of inverted circular cone
Height = 10 feet and radius = 4 feet
After water pumped out height = 5 ft
Hence volume of water pumped out =
Here we have r/h is constant always
Hence
Substitute to get volume of water pumped out =
Mass of water = density x volume =
Work done = force x displacement
= mass x accen x displacement
Here acceleration = gravity = 32.2 ft/sec^2
Displaement = height reduced = 5 ft
W=2912(32.2)(5)\pi =468832\pi foot -pound