3 years ago

If b = 3/x + 3/y what is the value of 1/b

Mathematics

1 answer:

sashaice [31]3 years ago

5 0

Answer:

xy / (3x + 3y)

Step-by-step explanation:

Find b first:

b = 3/x + 3/y
b = (3x + 3y)/xy

Find 1/b:

1/b = 1 : (3x + 3y)/xy
1/b = xy / (3x + 3y)

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Answer:

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2 years ago

Determine the range of the function.

Naya [18.7K]

Answer:

$Solution: f(x)\ge-5\\Interval:[-5,\infty)$

Step-by-step explanation:

Equation: $\frac{1}{4} x^2-5 = y$

1). $\frac{1}{4} x^2-5 = y$ → $\frac{x^2}{4}-5=y$

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3). $x_v=-\frac{b}{2a}$

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$=0$

4). now plug $x_v$ into $y_v$

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4 years ago

If y=-8 when x=2, find y when x=3

tatuchka [14]

I don't really know if the question is complete but...

y = x -10 can be a solution

so y would be -7 when x is 3

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3 years ago