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3 years ago

I need helpful answers pls

Mathematics

1 answer:

Ivenika [448]3 years ago

7 0

Answer:

X=5 the angle is 76 degrees

Step-by-step explanation:

The bottom angles are corresponding. So 52+52=104, so you need 76 more degrees. Then simple math to caculate x.

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Does the set of numbers represent a right triangle?<br> 20, 25, 15

r-ruslan [8.4K]

Answer:

No.

Step-by-step explanation:

20+25+15 = 60

A right is 90°. Therefore, 20, 25, and 15 do not make a right angle.

8 0

3 years ago

How to solve and why the answer is (A)

Amanda [17]

$\dfrac{1}{2}x^2+mx=5\\
\dfrac{1}{2}x^2+mx-5=0\\\\
\Delta=m^2-4\cdot\dfrac{1}{2}\cdot(-5)=m^2+10\\
\sqrt{\Delta}=\sqrt{m^2+10}\\\\
x=\dfrac{-m\pm\sqrt{m^2+10}}{2\cdot\dfrac{1}{2}}=-m\pm\sqrt{m^2+10}$

7 0

3 years ago

Okay plzzz I need Help!

loris [4]

Answer:

7 cuts

Step-by-step explanation:

A net of a cube looks like the image below.

It has 5 edges connected to each other; two to the side, three in the middle.

That means that 12 - 5 = 7 cuts have to be made.

7 0

3 years ago

The diameters of aluminum alloy rods produced on an extrusion machine are known to have a standard deviation of 0.0001 in. A ran

Murljashka [212]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The null hypothesis is rejected this means that $\mu \ne 0.5025$

The 95% confidence interval is $0.5045608 < \mu < 0.5046392$

Step-by-step explanation:

From the question we are told that

The standard deviation is s= 0.0001

The sample size is n = 25

The sample mean is $\= x = 0.5046 \ in$

The population mean is $\mu = 0.5025 \ in$

The null hypothesis is $H_o : \mu = 0.5025$

The alternative hypothesis is $H_a : \mu \ne 0.5025$

The test statistics is mathematically represented as

$t = \frac{0.5046 - 0.5025}{ \frac{0.0001}{\sqrt{25} } }$

$t = 105$

So the p-value from the z-table is mathematically represented as

$p-value = 2 * P( z > 105)$

$p-value = 0.000$

seeing that

$p-value < \alpha$ we reject the null hypothesis

The critical value of

$\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

The margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} }*\frac{s}{\sqrt{n} }$

=> $E = 1.96 *\frac{0.0001}{\sqrt{25} }$

=> $E =3.92 *10^{-5}$

The 95% confidence level is mathematically represented as

$\= x - E < \mu < \= x + E$

=> $0.5046 - 3.92 *10^{-5} < \mu < 0.5046 + 3.92 *10^{-5}$

=> $0.5045608 < \mu < 0.5046392$

8 0

3 years ago

How to turn 3/16 into a decimal

ASHA 777 [7]

I think 3.16 I said I think

3 0

3 years ago