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3 years ago

Please help fast need to get this and 6 more done

Mathematics

1 answer:

lara [203]3 years ago

3 0

Answer:

B = 4×4×ㅈ

l = 5 cm

SA= 4×5×ㅈ + 16 ㅈ

SA = 36 ㅈ

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3 years ago

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Can somebody help me with my geometry?

ahrayia [7]

The slope of AC is -0.4

Proof:
In triangles ABC and DBE,
∠DBE is common to both triangles.
AB = 2DB (D is the midpoint of the interval AB)
Also, BC = 2BE (E is the midpoint of the interval BC)

Thus triangles ABC and DBE are similar in the ratio 2:1

Since, they are similar, ∠BDE must equal ∠BAC (corresponding angles in similar triangles)

If ∠BDE = ∠BAC, DE must be parallel to AC (corresponding angles are equal along parallel lines)
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4 years ago

Is a dilation an example of a rigid motion. Explain your response.

Likurg_2 [28]

Answer:

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Step-by-step explanation:

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3 years ago

A professor records the difference between the marks scored by the students in the class test last week and those scored in the

dezoksy [38]

Answer: $(10.82\ , 13.18)$

Step-by-step explanation:

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$\mu\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 35 , large sample (n>30)

Mean difference : $\overline{x}=12$

Standard deviation : $\sigma=3$

Significance level : $\alpha=- 1-0.999=0.001$

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Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

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Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = $(10.82\ , 13.18)$

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3 years ago

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alukav5142 [94]

The correct answer is 3

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4 years ago