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8090 [49]
3 years ago
8

Which of the following gives all of the sets that contain -1/2?

Mathematics
1 answer:
fiasKO [112]3 years ago
3 0
ANSWER


The set of all rational numbers and the set of all real numbers.


EXPLANATION

The set of rational numbers contains all numbers that can be written in the form,


\frac{a}{b}


where a and b are integers and b≠0.


The given number is

-  \frac{1}{2}


It belongs to the set of rational numbers.


The set of rational numbers is a subset of the set of real numbers.

Hence

-  \frac{1}{2}
also belongs to the set of real numbers.


The correct answer is A.
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eimsori [14]

Answer:

Opening: Opens upwards

Axis of Symmetry: -7/2

Vertex: (-7/2, -81/4)

X - intercepts: (1, 0) and (-8, 0)

Y - intercept: (0, -8)

Step-by-step explanation:

Opening: 'a' is greater than zero

Axis of Symmetry:

\frac{-7}{2(1)} =\frac{-7}{2}

Vertex:

y= (\frac{-7}{2})^{2} +7(\frac{-7}{2}) -8\\y= (\frac{49}{4}) +(\frac{-49}{2}) -8\\y= \frac{49}{4} +\frac{-98}{4} -8\\y=\frac{-49}{4}-8\\y = \frac{-81}{4}

X - intercepts:

(x-1)(x+8)

x = 1 and x = -8

Y - intercept: (0, -8)

y= 0^{2} +7(0) -8\\\\y= -8\\

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3 years ago
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liraira [26]

Answer:

The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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The upper end of the interval is the sample mean added to M. So it is 67 + 4.54 = 71.54 ounces.

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