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3 years ago

Sheeesh please help pls

Mathematics

2 answers:

Mariulka [41]3 years ago

6 0

Area of a circle is:
A = (3.14)r^2

The picture shown is that the radius is 4

So,

A = (3.14)4^2

A = 50.2

~

IrinaVladis [17]3 years ago

5 0

4 squared times 3.14 =50.24 rounded to the nearest tenth 50.2

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Una heladeria dispone de 20 frutas distintas para elaborar sus malteadas. Si los clientes pueden elegir tres sabores para mezcla

Dahasolnce [82]

Answer:

Existen 6840 permitaciones de malteadas de tres sabores distintos que la heladería puede ofrecer.

Step-by-step explanation:

En este caso, el cliente que adquiere una malteada de tres sabores distintos sigue el siguiente procedimiento:

1) El primer sabor sale de cualquiera de las 20 frutas disponibles.

2) El segundo sabor es distinto al primer sabor, es decir, que sale de las 19 frutas restantes.

3) El tercer sabor es distinto al primer sabor y al segundo sabor, es decir, que sale de las 18 frutas restantes.

Puesto que existe una doble conjunción y que puede importar el orden según la preferencia del cliente, se habla matemáticamente de una permutación, definida como:

$n\mathbb{P}k = \frac{n!}{(n-k)!}$ (1)

Donde:

$n$ - Número de sabores disponibles, adimensional.

$k$ - Número de sabores escogidos, adimensional.

Si tenemos que $n = 20$ y $k = 3$ , entonces la cantidad de malteadas de tres sabores distintos es:

$n\mathbb{P}k = \frac{20!}{(20-3)!}$

$n\mathbb{P}k = \frac{20!}{17!}$

$n\mathbb{P}k = 20\cdot 19\cdot 18$

$n\mathbb{P}k = 6840$

Existen 6840 permitaciones de malteadas de tres sabores distintos que la heladería puede ofrecer.

5 0

3 years ago

My dog Wrigley weighs 67.094. My brothers dog Kobe, weighs 47.940. How much more does my dog Wrigley weigh?

Viktor [21]

Answer:

19.154 :)

Step-by-step explanation:

67.094

-47.940

--------------

19.154

8 0

3 years ago

Read 2 more answers

I don't understand the substitution method?

liq [111]

It depends on what variable you are tying to solve for first. Say you are trying to solve for x first and then y on the first problem you wrote.

In substitution you solve one of the equations for example with
6x+2y=-10
2x+2y=-10
you solve 2x+2y=-10 for x

2x+2y=-10
-2y = -2y (what you do to one side of the = you do to the other)
2x=-10-2y (to get the variable by its self you divide the # and the variable)
/2=/2 (-10/2=-5 and -2y/2= -y or -1y, they are the same either way)
x=-5-y

now you put that in your original equation that you didn't solve for:
6(-5-y)+2y=-10 solve for that
-30-6y+2y=-10 combine like terms
-30-4y=-10 get the y alone and to do this you first get the -30 away from it
+30=+30
-4y=20 divide the -4 from each side
/-4=/-4 (20/-4=-5)
y=-5

now the equation you previously solved for x can be solved for y.
x=-5-y
x=-5-(-5) a minus parenthesis negative -(- gives you a positive
-5+5=0
x=0

and now we have solved the problem. x=0 and y=-5

6 0

3 years ago

The number of students in a math club decreased from 15 to 11. What is the percent decrease? Round to the nearest percent.

Alinara [238K]

Answer:

27%

Step-by-step explanation:

Decrease= 15-11

Percentage=4÷15

=0.266666667

=26.667%

~27%

4 0

3 years ago

MATH HELP 10 POINTS <br><br> MUST ANSWER BOTH QUESTIONS

irinina [24]

1st = [ 9,10 ]

2nd = 9

8 0

3 years ago