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laiz [17]
2 years ago
11

Of 20 chickens, 9 are brown. What fraction is brown? (please show the working)​

Mathematics
2 answers:
Novosadov [1.4K]2 years ago
8 0

Answer:

9/20  also 45%

Step-by-step explanation:

well if 20 of them 9 are brown so 9 out of 20 of them are brown/45% of them because out of 20 each thing right or each person is 5%

ddd [48]2 years ago
5 0

Answer:

45/100 out of the 20 chickens are brown

Step-by-step explanation:

9/20 = 45/100

9/20 x 5 = 45/100

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7x-4(6-x)+12 if x = 6
aev [14]

Answer:

54

Step-by-step explanation:

7(6)-4(6-6)+12

42-0+12

54

5 0
3 years ago
An isosceles right triangle is a right triangle with congruent legs. if the length of each leg is represented by x, what algebra
Marina CMI [18]
By the Pythagoras theorem:-

h^2  = x^2 + x^2  
    (where h = hypotenuse)

h^2 = 2x^2

h = sqrt2 x
8 0
3 years ago
The surface area of a melting snowball decreases at a rate of3.8cm2/min. Find the rate at which its diameter decreases when the
Scorpion4ik [409]

Answer:

Step-by-step explanation:

This is a pretty basic related rates problem. I'm going to go through this just like I do in class when I'm teaching it to my students.

We see we have a snowball, which is a sphere. We are talking about the surface area of this sphere which has a formula of

S=4\pi r^2

In the problem we are given diameter, not radius. What we know about the relationship between a radius and a diameter is that

d = 2r so

\frac{d}{2}=r Now we can have the equation in terms of diameter instead of radius. Rewriting:

S=4\pi(\frac{d}{2})^2 which simplifies to

S=4\pi(\frac{d^2}{4}) and a bit more to

S=\pi d^2 (the 4's cancel out by division). Now that is a simple equation for which we have to find the derivative with respect to time.

\frac{dS}{dt}=\pi*2d\frac{dD}{dt} Now let's look at the problem and see what we are given as far as information.

The rate at which the surface area changes is -3.8, and we are looking for \frac{dD}{dt}, the rate at which the diameter is changing, when the diameter is 13. Filling in:

-3.8=\pi(2)(13)\frac{dD}{dt} and solving for the rate at which the diameter is changing:

-\frac{3.8}{26\pi}=\frac{dD}{dt} and divide to get

\frac{dD}{dt}=-.459\frac{cm}{min} Obviously, the negative means that the diameter is decreasing.

7 0
3 years ago
Sharon has a square picture frame with an area
frozen [14]

Answer:

200 inches of ribbon

Step-by-step explanation:

if the formula to finding an area is s²

and we already know that the area is 400, so we divide the area by 1/2 to get the length of each side

8 0
2 years ago
The perimeter of a rectangle is 24 centimeters.Its length is 9 centimeters. Find the width
liberstina [14]

Subtract 9 twice.

24-9-9 = 6

Half of 6 is 3, so 3 is the width since adding it twice and adding the length twice gives perimeter.

7 0
3 years ago
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