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jekas [21]
3 years ago
5

What is always true about a like that slants downward from left to right

Mathematics
2 answers:
Sveta_85 [38]3 years ago
7 0

Answer:

c, d

Step-by-step explanation:

a) can't work because you can have a slope of - 100

b) can't work because you can have a slope of -1

c) works because your equation is in form of y = -mx

So when x gets bigger, y gets smaller as y is negative when you multiply -m with c

d) works because a downward sloping line is always negative.

Norma-Jean [14]3 years ago
3 0

Answer:

the slope of the line is negative

Step-by-step explanation:

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A manufacturer uses production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standar
Arisa [49]

Answer:

\chi^2 =\frac{17-1}{12.15} 22.09 =15.87

Traditional method

We can find a critical value in the chi square distribution with df =16 who accumulates \alpha/2 =0.05 of the area on each tail and we got:

\chi^2_{crit}= 7.962

\chi^2_{crit}=26.296

Since the calculated value is between the two critical values we don't have enough evidence to conclude that the true deviation is NOT significantly different from 3.5 cm

Confidence level method

We can find the p value like this

p_v =2*P(\chi^2 >15.87)=0.92

Since the p value is higher then the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is NOT significantly different from 3.5 cm

Step-by-step explanation:

Data provided

n=17 represent the sample selected

\alpha=0.1 represent the significance

s^2 =4.7^2 =22.09 represent the sample variance

\sigma^2_0 =3.5^2 =12.15 represent the value to check

Null and alternative hypothesis

We want to verify if the new production method has lengths with a standard deviation different from 3.5 cm, so the system of hypothesis would be:

Null Hypothesis: \sigma^2 = 12.15

Alternative hypothesis: \sigma^2 \neq 12.15

The statistic for this case is given by:

\chi^2 =\frac{n-1}{\sigma^2_0} s^2

The degrees of freedom are:

df =n-1= 17-1=16

\chi^2 =\frac{17-1}{12.15} 22.09 =15.87

Traditional method

We can find a critical value in the chi square distribution with df =16 who accumulates \alpha/2 =0.05 of the area on each tail and we got:

\chi^2_{crit}= 7.962

\chi^2_{crit}=26.296

Since the calculated value is between the two critical values we don't have enough evidence to conclude that the true deviation is significantly different from 3.5 cm

Confidence level method

We can find the p value like this

p_v =2*P(\chi^2 >15.87)=0.92

Since the p value is higher then the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is significantly different from 3.5 cm

7 0
3 years ago
Solving the math function
Sunny_sXe [5.5K]

Answer: the answer is C

Step-by-step explanation: trust me took the final yesterday ‍♀️

3 0
2 years ago
Read 2 more answers
Evaluate the function f(x) = -4x + 2, when x = -1.
Mkey [24]

Answer:

Option D

Step-by-step explanation:

f(x) = -4x + 2

f(-1) = -4(-1) + 2 = 4 + 2 = 6

3 0
2 years ago
PLEASEEEE I NEED HELP!!!!<br> Find k in the following arithmetic sequence:<br> 4k-k^2, 3k, k
LenaWriter [7]
 3k - (k-2) = (k-2) - (k+7) 3k = (k-2) - (k+7) + (k-2) 3k = 2(k-2) - (k+7) 3k = 2k - 4 - k - 7 3k = k - 11 2k = -11 
k = -5.5
3 0
3 years ago
Biking at 10 mph, it takes Kristen an 1/2 hour to reach the train station to go to work. Kristen then takes the train to work, a
taurus [48]
Kristen travels 15 miles.
i know this because 10 divided by 2 is 5
added to 10 because 20 divided by 2 is 10.
5+10=15
7 0
3 years ago
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