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3 years ago

5

Who ever get this correct for me THANK YOU!!!!! Make sure you put them in ALL CAPS LETTERS PLS and You'll never get points from

me Frl(for real) because I'm 9th grader and idk how to do this and it confusing to me so BE SPECIFIC!!!!!!!!

1 answer:

Semmy [17]3 years ago

3 0

Answer:

DHGB

======================

1. D

-4x + 2y = 8 ⇒ -2x + y = 4 ⇒ y = 2x + 4
Parallel line has same slope of 2
y = 2x - 5

2. H

Slope is: (2-4)/(3-(-3)) = -2/6 = -1/3
Perpendicular line has negative reciprocal slope: -1/3 → 3
y = 3x - 2

3. G

Slope is: (2 - (-2))/(0 - (-1)) = 4/1 = 4
Parallel line has same lope of 4
y = 4x - 7

4. B

3x + y = 1 ⇒ y = -3x + 1
Perpendicular line has negative reciprocal slope: -3 → 1/3
y = 1/3x + 2

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Peter selects a sock from his drawer. The sock is black. There are 4 white socks, 7 blue socks, and 12 black socks left in the d

max2010maxim [7]

Answer:

5/12

7/12

125/36 = 3,47%

50/11 = 4,54%

Step-by-step explanation:

Probability a black sock is selected when a person chooses 1 sock = 5/12

Probability a white or brown sock is selected when a person chooses 1 sock =

7/12

Probability a person chooses 3 socks and selects a white first, a black second, and a brown last if the socks are replace = (4/12 * 5/12 * 3/12)*100 =125/36 = 3,47%

Pobability a person chooses 3 socks and selects a white first, a black second, and a brown last if the socks are NOT replace = (4/12 * 5/11 * 3/ 10)*100 = 50/11 = 4,54%

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3 years ago

A=960 rounded to the nearest 10 <br> b=89.0 rounded to 1 DP <br> Find the minimum (to 2 DP) of a÷b

astraxan [27]

Step-by-step explanation:

a÷b=960÷89=10.78651685=10.79 or 17.8

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3 years ago

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Which of the following products is greater than 6. A: 6×2/3. B: 6× 1/3. C: 6× 1 1/6. D: 6× 1/2 Don't mind all random work

Colt1911 [192]

Answer:

C. 6×11/6

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3 years ago

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3 years ago

A simple random sample of size nequals40 is drawn from a population. The sample mean is found to be 103.9, and the sample stand

yan [13]

Answer:

There is enough evidence to support the claim that the population mean is greater than 100

Step-by-step explanation:

<u>Step 1</u>: We state the hypothesis and identify the claim

$H_0:\mu=100$ and $H_1:\mu \:>\:100$ (claim)

<u>Step 2</u>: Calculate the test value.

$t=\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$

$\implies t=\frac{103.9-100}{\frac{21.9}{\sqrt{40} } }=1.1263$

<u>Step 3</u>: Find the P-value. The p-value obtained from a calculator is using d.f=39 and test-value 1.126 is 0.134

<u>Step 4</u>: We fail to reject the null hypothesis since P-value is greater that the alpha level. (0.134>0.05).

<u>Step 5</u>: There is enough evidence to support the claim that the population mean is greater than 100.

<u>Alternatively</u>: We could also calculate the critical value to obtain +1.685 for $\alpha=0.05$ and d.f=39 and compare to the test-value:

The critical value (1.685>1.126) falls in the non-rejection region. See attachment.

NB: The t- distribution must be used because the population standard deviation is not known.

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4 years ago