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18jonea
 one year ago
Solve the following expression for x: 81=3(x+y)^3
x = 243  y
x = 27  y
x = 3  y
x = 9  y
18jonea
 one year ago
Solve the following expression for x: 81=3(x+y)^3 x = 243  y x = 27  y x = 3  y x = 9  y

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ill try to help you but I'm not gonna put a answer if i think I'm wrong

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1\(81=3(x+y)^3\) Divide both sides by 3. What do you get?

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0what three am i taking away on the side though the exponent or the first 3

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1hint: we can write this: \[\Large {\left( {x + y} \right)^3} = \frac{{81}}{3} = 27\]

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0ok then how do i get rid of the exponent

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1you have to take the third rooth of both sides

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0so how would i do that?

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0how do you takw the 3 root of both sides

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. \(27=(x+y)^3\) Now we notice that \(27 = 3^3\), so we write: \(3^3 = (x + y)^3\) If the third power of 3 equals the third power of x + y, then 3 must equal x + y. You can also take the cubic root of both sides. \(3 = x + y\) There is only one step left. Subtract y from both sides.

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0so would it be 3y=x @Michele_Laino or 9y= x

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.1it is the first one, namely x+y=3

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0The following equation is used to determine the kinetic energy of an object: E=1/2mv^2. Solve for m:

18jonea
 one year ago
Best ResponseYou've already chosen the best response.0Write an expression for the following description: 23 less than the product of x and 6. 6x23 is that right
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