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3 years ago

I have this question in Geometry that I need help with, can you help me solve it?

Mathematics

1 answer:

Degger [83]3 years ago

6 0

Answer(6,1)

Step-by-step explanation:

you need to use the midpoint formula

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Jerry but for DVDs for $25.20 what was the unit rate

adoni [48]

If Jerry bought four DVDs for $25.20 and you would like to know what was the unit rate, you can calculate this using the following step:

$25.20 / 4 = $6.30

Result: The unit rate was $6.30.

6 0

3 years ago

Read 2 more answers

Home Videos Inc. surveys 450 households and finds that the mean amount spent for renting or buying videos is P135 a month and th

adell [148]

SOLUTION:

Case: Hypothesis testing

Step 1: Null and Alternative hypotheses

$\begin{gathered} H_0:\mu=P127.50 \\ H_1:\mu\leq P127.50 \end{gathered}$

Step 2: T-test analysis

$\begin{gathered} t=\frac{\hat{x}-\mu}{\frac{s}{\sqrt{n}}} \\ t=\frac{135-127.5}{\frac{75.25}{\sqrt{450}}} \\ t=2.144 \end{gathered}$

Step 3: t-test with the significance level

$\begin{gathered} t_{\alpha}=? \\ \alpha=0.05 \\ From\text{ }tables \\ t_{0.05}=1.654 \end{gathered}$

Step 4: Comparing

$t>t_{\alpha}$

So tail to reject the null hypothesis. There is enough evidence at a 0.05 level of significance to claim that the mean spent is greater than P127.50.

Final answer:

Yes, there is evidence sufficient to conclude that the mean amount spent is greater than P127.50 per month at a 0.05 level of significance.

6 0

1 year ago

What is the <img src="https://tex.z-dn.net/?f=%5Csqrt%7Bx%7D%208" id="TexFormula1" title="\sqrt{x} 8" alt="\sqrt{x} 8" align="ab

LUCKY_DIMON [66]

Answer:

2.8

Step-by-step explanation:

Plugging the square root of 8 into a calculator gives you 2.8 rounded to the nearest 10ths place.

This is not a perfect square.

8 0

3 years ago

How do you find the circumference of a cirlcle?

yKpoI14uk [10]

There are 2 formula to find the circumference of a circle.

$\huge{\boxed{\bf{Circumference=2\pi r}}}$

$\huge{\boxed{\bf{Circumference=\pi D}}}$

$\pi$ is approximately 3.14
r is radius
D is diameter

and just a side note, $\huge{\boxed{\bf{2 r = D}}}$
Hope that formula helps you :)

7 0

3 years ago

Read 2 more answers

If sin θ = 3 over 7 and tan θ < 0, what is the value of cos θ?

AnnZ [28]

$if\ \sin\Theta \ \textgreater \ 0\ and\ \tan\Theta \ \textless \ 0\ then\ \Theta\in\underbrace{(90^o;\ 180^o)}_{\left(\dfrac{\pi}{2};\ \pi\right)}\\\\therefore\ \cos\Theta \ \textless \ 0.$

$\text{Use:}\ \sin^2x+\cos^2x=1\\\\\left(\dfrac{3}{7}\right)^2+\cos^2\Theta=1\\\\\dfrac{9}{49}+\cos^2\Theta=1\ \ \ |-\dfrac{9}{49}\\\\\cos^2\Theta=\dfrac{40}{49}\to\cos\Theta=-\sqrt{\dfrac{40}{49}}\\\\\cos\Theta=-\dfrac{\sqrt{40}}{\sqrt{49}}\\\\\cos\Theta=-\dfrac{\sqrt{4\cdot10}}{7}\\\\\boxed{\cos\Theta=-\dfrac{2\sqrt{10}}{7}}$

8 0

4 years ago