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3 years ago

3

1 answer:

3 0

Answer: D:{8,-6,2,0}: R:{5,-9,5,-8}

Explanation:
The domain is x and the range is y, so I'll go through each coordinate;
(8,5) domain=8; range=5
(-6,-9) domain=-6; range=-9
(2,5) domain=2; range=5
(0,-8) domain=0; range=-8
So the answer is D:{8,-6,2,0}: R:{5,-9,5,-8}

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What are the fourth, seventh, and tenth terms of the sequence A(n) = 7 + (n - 1)(-3)?

vivado [14]

Answer:

Step-by-step explanation:

fourth term

A(4)= 7 - ( 4-1)(-3)

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seventh term

A(7)= 7 - (7-1)(-3)

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tenth term

A(10) = 7 - (10-1)(-3)

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3 years ago

Find the value of (3 + 4)2

elena55 [62]

Answer:

Step-by-step explanation:

We solve this by using 2 to open the bracket

(3+4)2 is the same as 2(3+4)

2(3)+2(4)

=6+8

=14

(3+4)2 is the same as 2(3+4)

So we can solve the one inside the bracket first

=2(7)=14

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3 years ago

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4 years ago

Read 2 more answers

he blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 6

Ulleksa [173]

Answer:

The approximate percentage of women with platelet counts within 3 standard deviations of the mean is 99.7%.

Step-by-step explanation:

We are given that the blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3 and a standard deviation of 60.7.

Let X = the blood platelet counts of a group of women

The z-score probability distribution for the normal distribution is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1)

where, $\mu$ = population mean = 247.3

$\sigma$ = standard deviation = 60.7

Now, according to the empirical rule;

68% of the data values lie within one standard deviation of the mean.

95% of the data values lie within two standard deviations of the mean.

99.7% of the data values lie within three standard deviations of the mean.

Since it is stated that we have to calculate the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 65.2 and 429.4, i.e;

z-score for 65.2 = $\frac{X-\mu}{\sigma}$

= $\frac{65.2-247.3}{60.7}$ = -3