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allsm [11]
3 years ago
12

Question 1. Solve using linear combination

Mathematics
1 answer:
Natali5045456 [20]3 years ago
4 0
1) 4d = 24
d = 6
answer d

2) 4d = 12
d = 3
answer c

3) y = 0
ordered pair: (-5 , 0)

Hope this helps!
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Fill in the blanks to complete the sentence.
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Answer:

Step-by-step explanation:

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When is a zero not significant?
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Assume the general population gets an average of 7 hours of sleep per night. You randomly select 45 college students and survey
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Answer:

a) ii. This is a left-tailed test.

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c) -1.301

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Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 7 hours

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Sample standard deviation, s =  0.55 hours

First, we design the null and the alternate hypothesis

H_{0}: \mu = 7\text{ hours}\\H_A: \mu < 7\text{ hours}

a) We use one-tailed(left) t test to perform this hypothesis.

b) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

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c) Now,

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Since,                    

t_{stat} < t_{critical}

d) We fail to accept the null hypothesis and reject it.

We accept the alternate hypothesis and conclude that  mean number of hours of sleep for all college students is less than 7 hours.

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B

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Every (x,y) pair is equal to each other, thus making them proportional :)

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48.8 cm2 that is the answer I got
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