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Mathematics 21 Online
OpenStudy (skittles_for_life6422):

Help how to you solve this!!!

OpenStudy (skittles_for_life6422):

The general equation of a plane is Ax + By + Cz = D, where A, B, C and D are real numbers and A is nonnegative. Find the equation of the plane containing the points (3, 0, 0), (0, 8, 0), and (0, 0, 6). Show each step of your process. Then graph the plane. Answer: Equation: ________________________

OpenStudy (mahoganie.carson):

Work this problem as 3 equations and 3 unknowns: Rewrite the standard equation like this: A/Dx + B/Dy + C/Dz = 1 To clean this up I used new variables: A/D = m, B/D = n, and C/D = o So: mx + ny + oz = 1 Now put each point onto this equation: 3m + 0 + 0 = 1 0 + 8n + 0 =1 0 + 0 + 6o = 1 In this case you can solve each directly, otherwise you could use substitution. m = 1/3 n = 1/8 o = 1/6 Put these values in the cleaned up equation: 1/3 x + 1/8 y + 1/6 z = 1 This is in standard form, however you can multiply each term by 24 to remove fractions: 8x + 3y + 4z = 24.

OpenStudy (skittles_for_life6422):

This may help

OpenStudy (skittles_for_life6422):

is that really it @Mahoganie.Carson

OpenStudy (skittles_for_life6422):

oh i forgot to ask how do you graph the equation

OpenStudy (mahoganie.carson):

I'm not sure but this is what i did i'm going to do it again to see

OpenStudy (skittles_for_life6422):

ok

OpenStudy (mahoganie.carson):

(2, 0, 0) -> 2A + 0 + 0 = D -> 2A = D -> A = D/2 (0, 6, 0) -> 0 + 6B + 0 = D -> 6B = D -> B = D/6 (0, 0, 5) -> 0 + 0 + 5C = D -> 5C = D -> C = D/5 plugging this back into the equation: (D/2)x + (D/6)y + (D/5)z = D [then divide through by D] (1/2)x + (1/6)y + (1/5)z = 1 and since we have to have integer coefficients, multiply through by 30 so we get 15x + 5y + 6z = 30 as our answer :)

OpenStudy (mahoganie.carson):

Or it could be this i should ask johnyy9 to see if i'm right

OpenStudy (skittles_for_life6422):

ok thank you :)

OpenStudy (mahoganie.carson):

Welcome :) You Get It Right?

OpenStudy (skittles_for_life6422):

@johnyy9 can you help

OpenStudy (mahoganie.carson):

Yeah He Helps Everyone

OpenStudy (skittles_for_life6422):

im not sure if i got it right my teacher didnt give me a key

OpenStudy (mahoganie.carson):

Hold I'll at Someone

OpenStudy (skittles_for_life6422):

ok

OpenStudy (mahoganie.carson):

@Jaynator495 Can You See If One Of My Answers Is Right Please :)

OpenStudy (skittles_for_life6422):

maybe we can work on this other problem

OpenStudy (skittles_for_life6422):

OpenStudy (mahoganie.carson):

Did you ask your teacher? or is anyone there home with you that can help you?

OpenStudy (skittles_for_life6422):

no i dont have anyone to help me thats why im here

OpenStudy (mahoganie.carson):

Well i dont know what to do i'll at johnyy9 when he get on that's the first thing he see

OpenStudy (mahoganie.carson):

@jhonyy9 Can You See If One Of My Answers Are Right Please :)

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