Friday

November 21, 2014

November 21, 2014

Posted by **Lee** on Tuesday, November 23, 2010 at 2:19am.

#8)One type of lawn fertilizer consists of a mixture of nitrogen, phosphorus and potassium. An 80lb sample contains 8 move lbs of nitrogen and phosphorus than potassium. There is 16lb more potasssium than 5 times the amount of phosphorus. Let x be the amount of nitrogen, let y be the amount of phosphorus and let z be the amount potassium in the sample. Find the amount of each of the chemicals in the sample.

X = _____

y = _____

z = _____

(Hint: you must set up and solve a 3 by 3 systems of equations.)

- college -
**drwls**, Tuesday, November 23, 2010 at 6:17amI will assume that you meant "more" where you wrote "move"

The three equations you have to solve are

X + Y + Z = 80 (pounds)

X + Y - Z = 8

Z = 5Y + 16

The first two equations tell you right away that 2Z = 72, so Z = 36

The last equation tells you that 5Y = 20, so Y = 4.

X + 4 + 36 = 80, so X = 40

- college -
**Lee**, Tuesday, November 23, 2010 at 10:34amYou're correct move is suppose to be more. Thank you so much for explaining this to me. It's very helpful.

**Answer this Question**

**Related Questions**

college Algebra - Please explain with complete step by step instructions. #8)One...

math - I'm not sure of how to solve word problems. The question is,"One lawn ...

math - I'm not sure of how to solve word problems. The question is,"One lawn ...

math - SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of ...

8th grade - I am having trouble with these kinds of problems and I ask my ...

Steps in Chemistry - You notice that a lawn looks unhealthy and that, perhaps, ...

Chemistry Damon step bystep for me - A 0.887g sample of a mixture of nacl and ...

CHEM - The decomposition of nitrogen dioxide 2NO2-->2NO+O2 occurs in a two-...

College chemistry - A farmer applies 13.50 kg of a fertilizer that contains 10.0...

Chemistry - 1. Nitrogen monoxide is oxidized in air to give brown nitrogen ...