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3 years ago

Please help ASAP for question b

Mathematics

1 answer:

zlopas [31]3 years ago

6 0

Answer: The height of the new player is 210 cm

Step-by-step explanation: The previous mean of the entire team has been calculated as 200.3

What this means is that, we have a summation of the observed data and a summation of the frequency of data.

The mean was calculated as

Sum FX/Sum F = 200.3

Where Sum FX is 2604 and Sum F is 13

However, our calculation should now read thus,

Sum FX/Sum F = 201 {where 201 is the new mean}

By cross multiplication we now have

Sum FX = Sum F x 201

Remember that a new member has joined the team so our Sum F is now 14 and we can now express it as thus

Sum FX = 14 x 201

Sum FX = 2814

If the summation of the observed data after adding a new team member is now 2814, then the addition to the previous observed data would be

2814 - 2604 = 210

So the height of the new member added to the team is 210 cm.

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Evaluate 82.5÷0.25 express the answer in standard form

Marina86 [1]

Answer:

330

Step-by-step explanation:

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2 years ago

A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.

AlekseyPX

Answer:

The margin of error for a 99% confidence interval for the population mean is 1.8025.

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:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

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In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

$\sigma = 5.6$

$M = 2.575*\frac{5.6}{\sqrt{64}} = 1.8025$

The margin of error for a 99% confidence interval for the population mean is 1.8025.

5 0

2 years ago

Check the screenshot for the question. 25 POINTS

svet-max [94.6K]

Answer: Y = -10

Step-by-step explanation:

-x + y = -27

-17 + y = -27

+17 +17

Y = -10

You can also check your work by plugging in the X and Y values and it should equal -27 . So -17 + -10 equals -27.

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2 years ago

PLEASE HELP QUICK!!! WILL GIVE BRAINLIEST!!

Lera25 [3.4K]

Answer:

$\boxed{\bold{112}}$

Step By Step Explanation:

Follow PEMDAS Order Of Operations

Calculate Within Parenthesis: $\bold{120+\left(12\div \:3\cdot \:30\right): \ 240}$

$\bold{240\div \:20+10^2}$

Calculate Exponents: $\bold{10^2: \ 100}$

$\bold{240\div \:20+100}$

Divide: $\bold{240\div \:20: \ 12}$

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Add

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2 years ago

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weqwewe [10]

(3x+2)(x-7)

All you need to do is FOIL.

3x^2-7x+2x-14

3x^2-5x-14

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2 years ago