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Citrus2011 [14]

2 years ago

7

Use properties of exponents to solve for a and b in the problem below. No calculator allowed. Please help; I don't know what I'm

doing.

1 answer:

Ostrovityanka [42]2 years ago

7 0

A= 7843/324b. i think it might be that, not so sure

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Choose the linear inequality that describes the graph. The gray area represents the shaded region

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(0,3)(1,-2)
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3 years ago

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4. A horizontal ellipse, centered at the origin has a major axis of 10 units and minor axis of 8 units. Write the

s2008m [1.1K]

Answer:

$\frac{x^2}{25} +\frac{y^2}{16} =1$

Step-by-step explanation:

For ellipses, the length of the major axis is represents as:

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$10=2a$

solving for the semi-major axis $a$ :

$a=10/2\\a=5$

and also the minor axis of an ellipse is represented as:

Minor axis = $2b$

where $b$ is called the semi-minor axis.

Since the minor axis has a length of 8 units:

$8=2b$

solving for b:

$b=8/2\\b=4$

Now we can use the equation for an ellipse centered at the origin (0,0):

$\frac{x^2}{a^2} +\frac{y^2}{b^2} =1$

and substituting the values for $a$ and $b$ :

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and finall we simplify the expression to get the equation of the ellipse:

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3 years ago

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3 years ago

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P(5 are not black) = P(5 are red)

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3 years ago