2 years ago

Which size random sample is likely to provide the most trustworthy results

Mathematics

1 answer:

Zarrin [17]2 years ago

4 0

At least 30 observations to get a reasonably normal distribution.

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Y=4x-5 what is the slope

Reika [66]

The slope is 4 ok bro bro

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2 years ago

In Aunt Melly's attics there are also spiders and ants, the total of 136 legs and 20 heads. If a spider has 8 legs and an ant ha

anzhelika [568]

Answer:

Spiders=8

Ants=12

Step-by-step explanation:

Spider(s)=8 legs

Ants(a)=6 legs

Total legs=136

Total heads=20

8s+6a=136 (1)

s+a=20 (2)

From (2)

s=20-a

Substitute 20-a into (1)

8s+6a=136

8(20-a)+6a=136

160-8a+6a=136

160-2a=136

-2a=136-160

-2a=-24

a= -24/-2

a=12

Substitute a=12 into (2)

s+a=20

s+12=20

s=20-12

s=8

3 0

3 years ago

What equation represents the graphed function

Marina86 [1]

Answer: $y=\dfrac{-1}{3}x+3$

Step-by-step explanation:

The equation of ab line that passes through two points (a,b) and (c,d) is given by :-

$(y-b)=\dfrac{d-c}{b-a}(x-a)$

From the given picture , the line is passing through points (0,3) and (3,2).

Then, the equation of the line will be :-

$(y-3)=\dfrac{2-3}{3-0}(x-0)$

$\Rightarrow y-3=\dfrac{-1}{3}x$

$\Rightarrow y=\dfrac{-1}{3}x+3$

Hence, the required equation of the line that represents the graphed function : $y=\dfrac{-1}{3}x+3$

7 0

3 years ago

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Find the angle which is equal to its supplement.

vesna_86 [32]

Answer:

the angle which is equal to its supplement is 90 degree

8 0

2 years ago

Please help me<br><br> ( - 3 ) ( a + x ) , if a + 8, x = - 10

BARSIC [14]

Answer:

Step-by-step explanation:

-3 x (8 + [-10]) =

-3 x (8 - 10) =

-3 x -2 =

HOpe that helps!

7 0

2 years ago

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