$~~~~x^2-6xy=z-9y^2\\\\\implies x^2- 2\cdot x\cdot 3y + (3y)^2 - (3y)^2 = z-9y^2\\ \\\implies (x-3y)^2 -9y^2 = z-9y^2\\\\\implies (x-3y)^2 = z\\\\\implies x - 3y =\pm\sqrt z\\\\\implies x = 3y\pm\sqrt z$

4 0

2 years ago

A business is planning to make a new kind of speaker. The cost to produce x speakers is C=72,000+18x. Meanwhile, the revenue ear

Sophie [7]

[tex]\begin{gathered} C=\text{ 72000 + 18x} \\ R=\text{ 27x } \\ \\ R\text{ }Therefore, the company loses money if it sells less than 8000.

The answer is D.

7 0

1 year ago

Please help!!! Thanks!!

Elena L [17]

Answer:

Step-by-step explanation:

7 0

2 years ago