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Crank
3 years ago
13

Am I correct? Please check my answer

Mathematics
1 answer:
avanturin [10]3 years ago
6 0
Yes your right ...."...............................
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There are 30 students in a class, including 16 boys. The ratio of girls to boys would be 7 over 8.
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Answer:

i dont understand- theres 3 ways u can put them tho 7:8 , 7 to 8 , or 7/8

Step-by-step explanation:

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HOW DO U USE A MATH PYRAMID WITH NUMBERS
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Use this website https://nrich.maths.org/2281

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What is the Percentage of 23000?
tankabanditka [31]

Answer:  0.00435 If you do it by one.

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              I really hope this helps have a good day :))  (pls make brainliest im trying to each a goal!)

Step-by-step explanation:

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3 years ago
Thinking about the areas of a Standard Normal Distribution, as z values decrease, do the areas to the left of z increase, or dec
Vera_Pavlovna [14]
The figure below shows the standard normal distribution or "bell-shaped" curve, plotted against the z-score.
The z-score is defined as
z = (x - μ)/σ
where
x = nrandom variable
μ = mean
σ = standard deviation.

As z-values decrease, areas to the left of z decrease as shown by the shaded area.

Answer:
Areas to the left of z decrease.

8 0
3 years ago
The area of a duck enclosure is 300 square feet, with 100 square feet occupied by a pond. Each duck in the enclosure needs more
SVEN [57.7K]
Answer: Choice B) x < 10

=======================================================

Explanation:

There's 300 square feet total (land+water). Of that, 100 sq ft is taken up by the pond, so we have 300-100 = 200 sq ft of dry land. 

1 duck needs more than 20 sq ft of dry land
2 ducks need more than 40 sq ft of dry land (note how 2*20 = 40)
3 ducks need more than 60 sq ft of dry land (note how 3*20 = 60)
and so on...

In general, 
x ducks need more than 20*x square feet of dry land

The max amount of dry land we have is 200 sq ft
The total amount of space the ducks take up must be less than 200 sq ft

In terms of symbols, we have
T = total space ducks take up on dry land
T = 20*x
T < 200

So we can arrive at this inequality
20*x < 200
after replacing the "T" with "20*x"

Afterward, divide both sides by 20
20*x < 200
20*x/20 < 200/20
x < 10
So we must have less than 10 ducks

If we had 10 ducks exactly, then they would take up more than 20*10 = 200 sq ft, but we only have 200 sq ft

The largest number of ducks we can have is 9 ducks.
So that's why we have a "less than" symbol instead of a "less than or equal to" symbol.
5 0
3 years ago
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