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sweet [91]
3 years ago
5

Can somebody help me with this problem

Mathematics
1 answer:
Andrew [12]3 years ago
5 0
Number of calico crayfish
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When factoring a trinomial, what is the first step you should do before you
Musya8 [376]

Answer:

B

Step-by-s??????????tep explanation:

8 0
3 years ago
Suppose a sample of 30 employees from the manufacturing industry showed a sample mean of $23.89 per hour. Assume a population st
timama [110]

Answer:

The<em> p</em>-value of the test is 0.1212.

Step-by-step explanation:

A one sample <em>z</em>-test can be performed to determine whether the mean hourly wage differs from the reported mean of $24.57 for the goods-producing industries.

The hypothesis is defined as:

<em>H₀</em>: The mean hourly wage is same as the reported mean of $24.57 for the goods-producing industries, i.e. <em>μ</em> = $24.57.

<em>Hₐ</em>: The mean hourly wage differs from the reported mean of $24.57 for the goods-producing industries, i.e. <em>μ</em> ≠ $24.57.

The information provided is:

\bar x=\$23.89\\n=30\\\sigma=\$2.40

Compute the test statistic as follows:

z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}=\frac{23.89-24.57}{2.40/\sqrt{30}}=-1.55

The test statistic value is, <em>z</em> = -1.55.

Compute the <em>p</em>-value of the test as follows:

p-value=2\times P(Z

*Use a <em>z</em>-table for the probability.

Thus, the<em> p</em>-value of the test is 0.1212.

4 0
4 years ago
What is the volume of the composite figure?<br> 12in<br> 4 in<br> 3 in.<br> 7 in.
Minchanka [31]

Answer:

Step-by-step explanation:

V_p = b \cdot h \cdot w, where b, h, w are base, height and width respectively.

V_{sp} = \frac{1}{3} \cdot {A_b} \cdot h, where h is the height, and A_b is the area of the base.

First let's calculate the volume of the paralelipiped by the first formula.

V_p = 7 \cdot 4 \cdot 3 = 84 in^2

Then let's find out the height of the pyramid, which is 12 - 4 = 8 in.(See drawing)

Then the area of the base of the square pyramid is simply.

A_r = 3 \cdot 7 = 21 in^2

Now we can find the volume of the pyramid.

V_{sp} = \frac{1}{3} \cdot 21 \cdot 8 = 56 in^3

To find the total volume, let's add both volumes.

V_T = 84 + 56 = 140 in^3

5 0
3 years ago
Which of the following is the simplified form of the expression -x(x - y) + 4xy - x2?
Leokris [45]
-x+xy +4xy-x2
-2x2+5xy
C.-2x2+5xy
6 0
3 years ago
I need help pleaseeeee this is due tomorrow
sveta [45]

Another way of finding Surface Area is

  1. SA= 2LW+2LH+2HW

L= Length

W= Width

H= Height

the answer, and explained, would be this

2. SA= 2(12)(10)+2(12)(16)+2 (10)(16)

(<em>multiply</em>)

3. SA= 240 + 384 + 320

(<em>add</em>)

<em>The</em><em> </em><em>answer</em><em> </em><em>is</em><em>.</em><em>.</em><em> </em>

<em><u>SA</u></em><em><u>=</u></em><em><u>944ft3</u></em><em><u> </u></em>

7 0
3 years ago
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