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2 years ago

Please Help Marking Brainiest

Mathematics

2 answers:

Alex17521 [72]2 years ago

5 0

Answer:

(4,18)

Step-by-step explanation:

We can just pluck the x values into the equation: y = 5x -1 to see if the y values fit.

1. y = 5(4) - 1

= 20 - 1

= 19 (Nope, 18 is not 19)

2. y = 5(3) - 1

= 15 - 1

= 14 (Yep, same as option)

3. y = 5(0) - 1

= 0-1

= -1 (Yep, same as option)

4. y = 5(2) - 1

= 10 - 1

= 9 (Yep, same as option)

Volgvan2 years ago

4 0

Answer:

(4,18)

Step-by-step explanation:

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We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

6 0

2 years ago

The souvenir stand sells hats, postcards, and magnets. They have twice as many postcards as hats, and 100 more magnets than post

Ratling [72]

Answer:

4h + 100

Step-by-step explanation:

h = total number of hats

postcards = 2h

magnets = h + 100

Add them all together:

h + 2h + h + 100 = 4h +100

8 0

2 years ago

Based only on the given information, it is guaranteed that Ac = bc

qwelly [4]

Answer:

True

Step-by-step explanation:

True because if AC = BC, then the triangles are the same.

8 0

3 years ago

Help pls ill give extra points

Nadya [2.5K]

Suzuki after line 3 where it says 42 / 5 +16 she shouldn’t have added 5 and 16 she needs to follow pemdas and do 42/5 which is 8.4 then she needs to add 8.4 and 16 to get an answer of 24.4

6 0

2 years ago

A Chinese restaurant offers buffet takeout for $4.99 per pound. How much does your takeout meal cost if it weighs 0.65 pounds?

sp2606 [1]

T = 4.99(.65) just multiply

6 0

3 years ago

Read 2 more answers