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2 years ago

Find the midpoint of (1,8) and (9,6)

Mathematics

1 answer:

Anon25 [30]2 years ago

4 0

Answer:

(5,7)

Step-by-step explanation:

(1,8)

(9,6)

x+x= 9+1=10

y+y= 8+6=14

ans. divide by 2

(5,7)

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A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx⎯ ⎯ x¯ = 840 and

gayaneshka [121]

Answer:

$(832.156, \ 847.844)$

Step-by-step explanation:

Given data :

Sample standard deviation, s = 15

Sample mean, $\overline x = 840$

n = 23

a). 98% confidence interval

$\overline x \pm t_{(n-1, \alpha /2)}. \frac{s}{\sqrt{n}}$

$$E= t_{( n-1, \alpha/2 )} \frac{s}{\sqrt n}}$

$t_{(n-1 , \alpha/2)} \frac{s}{\sqrt n}$

$t_{(n-1, a\pha/2)}=t_{(22,0.01)} = 2.508$

∴ $E = 2.508 \times \frac{15}{\sqrt{23}}$

$E = 7.844$

So, 98% CI is

$(\overline x - E, \overline x + E)$

$(840-7.844 , \ 840+7.844)$

$(832.156, \ 847.844)$

4 0

2 years ago

Please check my work:

11Alexandr11 [23.1K]

Answer:

1) C (5,-11)

2)A and C

3)B

4)A

8 0

2 years ago

Hello! May someone please help on this :)<br> I would probably give brainliest.

ivanzaharov [21]

Answer:

theres 16 doughnuts

Step-by-step explanation:

6 0

3 years ago

Long’s Coffee Shop sells a refill mug for $8.95. Each refill costs $1.50. Last month,

dem82 [27]

Answer: 12 refills

Step-by-step explanation:

y = 8.95 + 1.50x

26.95= 8.95 + 1.50x

26.95 - 8.95 = 1.50x

18 = 1.50X

18 / 1.50 = x

X = 12

8 0

2 years ago

Please help and explain ALL the steps to the problem

Liono4ka [1.6K]

So, 1725 would be 1 and a half month's pay of rent.

The equation would be 1725 divided by 1.5 since that would get us what the two friends paid for one month of rent. Let r= rent.

1725/1.5= r

1725/1.5= 1150

So, rent would equal $1150.

I hope this helps!
~cupcake

8 0

2 years ago