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Nitella [24]
3 years ago
6

Solve. -5 3/4 - 3 1/2

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
6 0
The answer to this is -37/4
zloy xaker [14]3 years ago
6 0
Wat ever this dude said he was right
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1. Solve the equation.<br>4(x + 5) = 24<br><br>​
bixtya [17]

Answer:

x=1

Step-by-step explanation:

4(x+5)= 24

4x+20=24

-20 -20

____________

4x = 4

___ ____

4 4

x= 1

7 0
3 years ago
Read 2 more answers
An unconfined compression test was performed to determine the average strength of concrete cylinders (in psi). It is believed th
Ronch [10]

Answer:

Explained below.

Step-by-step explanation:

(1)

The confidence level is, 91%.

Compute the value of α as follows:

\text{Confidence level}\% =(100-\alpha \%)\\\\91% = 100-\alpha \%\\\\\alpha \%=100-91\%\\\\\alpha \%=9\%\\\\\alpha =0.09

(2)

As the population standard deviation is provided, i.e. <em>σ</em> = 256 psi, the <em>z</em> value would be appropriate.

The <em>z</em> value for α = 0.09 is,

<em>z</em> = 1.69

(3)

Compute the 91% confidence interval as follows:

CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}

     =3000\pm 1.69\cdot\frac{256}{\sqrt{70}}\\\\=3000\pm 51.71\\\\=(2942.29, 3057.71)

(4)

The 91% confidence interval for population mean implies that there is a 0.91 probability that the true value of the mean is included in the interval, (2942.29, 3057.71) psi.

8 0
2 years ago
What is the exact value of cos(11pi/21)cos(pi/7)-sin(11pi/21)sin(pi/7)?
Anika [276]

Answer:

B

Step-by-step explanation:

-1/2

7 0
2 years ago
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Find the measure of "theta". Round all answers to the nearest tenth.
Anika [276]

Answer:

58.6 degrees

Step-by-step explanation:

6 0
2 years ago
If two triangles have three congruent, corresponding
Tcecarenko [31]

Answer:

  a pair of corresponding sides must be shown congruent

Step-by-step explanation:

The triangles are "similar" if corresponding angles are congruent. The triangles will only be "congruent" if corresponding sides are also congruent. The additional information needed is that <em>there is one congruent pair of corresponding sides</em>. (If there's one pair, all pairs of corresponding sides will be congruent.)

Having one pair of corresponding sides congruent would allow you to invoke either of the ASA or AAS congruence postulates.

5 0
2 years ago
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