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OverLord2011 [107]
3 years ago
15

2/5,8/20: is it a proportion?

Mathematics
1 answer:
katen-ka-za [31]3 years ago
6 0

Answer:

Step-by-step explanation:

you need to simplify 8/20

8/20  can be put into the greatest common factor which is 4

then divide both sides by 4 this equals to 2/5

So yes they are

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One milliliter of blood contains approximately 5 million red blood cells, and one pint is about 473 milliliters. Create and solv
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2,365,*10^6=5,000,000*473

(P.S. 10^6 is 10 to the sixth power)
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3 years ago
Write the quadratic equation whose roots are 4 and 5, and whose leading coefficient is 4.
Umnica [9.8K]

Answer:

<u>Answer</u><u>:</u><u> </u><u>4</u><u>x</u><u>²</u><u> </u><u>-</u><u> </u><u>9</u><u>x</u><u> </u><u>+</u><u> </u><u>2</u><u>0</u><u> </u>

Step-by-step explanation:

• General quadratic equation:

{ \rm{ {x}^{2}  - (sum \: of \: roots)x + (product \: of \: roots) }}

• sum of roots → 4 + 5 = 9

• product of roots → 4 × 5 = 20

• substitute:

{ \boxed{ \rm{4 {x}^{2}  - 9x + 20 }}}

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3 years ago
Elena and Noah are each filling a bucket with water. Noah's bucket is 2/5
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Answer:

2 because 2 mas dos usual a 4

Step-by-step explanation:

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3 years ago
Suppose that a​ researcher, using data on class size ​(CS​) and average test scores from 97 ​third-grade classes, estimates the
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Step-by-step explanation:

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5 0
3 years ago
PLZ HELP 100 POINTS AND DONT BE MEAN
cricket20 [7]

Answer:

Full drum 80 dollars

one lid missing

earn 10 dollars less

Step-by-step explanation:

We need to find the surface area

SA = 2 pi r^2  + 2 pi rh

The diameter is 2 so the radius = 2/2 =1

SA = 2 * pi * 1^2  + 2 * pi * 1 * 3

      = 2 pi + 6pi

      = 8pi

Using pi = 3.14

SA = 8 *3.14 = 25.12 ft^2

We get 3.18 per ft^2

25.12 * 3.18 =79.88

To the nearest dollar

80 dollars

If one of the lids is missing

SA =  pi r^2  + 2 pi rh

        pi + 6pi

        7 pi

Using pi = 3.14

SA = 7 *3.14 = 21.98 ft^2

We get 3.18 per ft^2

21.98 * 3.18 =69.90

To the nearest dollar

70

The difference is 10 dollars

6 0
3 years ago
Read 2 more answers
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