Mathematics, 10.04.2020 20:20, ayoismeisalex

What is the probability of choosing a blue marble out of a bag containing 3 red , 1 green , 4 blue , and 2 yellow marbles.

Answers: 1

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Answers

2/5 because you add up all the number the total is your bottom part of the fraction, and the number of blue is the stop you should get 4/10 then simplify to 2/5

answered: smartgirl30

the probability of choosing a blue marble is 4/10 or 0.4 or 40%.

Step-by-step explanation:

the first thing you do is count all the marbles together which in this problem its 10. then you read what the question is asking you in this case 4 blue, so you make it a fraction 4/10.to make it a decimal, you divide 4 ÷ 10 it will give you 0.4, and to make it a percent you you multiply 4×10, it will give you 40%.

answered: Guest

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

$ab^2+ac^2=bc^2$

$ab^2+ac^2=x^2$ )

triangle abd and cba are similar,

$\frac{ab}{bc}=\frac{bd}{ab}$

$ab^2=bc\cdot bd$

$25=bc\cdot bd$ (2)

triangle cad and cba are similar,

$\frac{ac}{bc}=\frac{cd}{ac}$

$ac^2=bc\cdot dc$

$7\times 7=bc\cdot dc$

$49=bc\cdot dc$ )

using (1), (2) and (3), we get

$25+49=x^2$

$74=x^2$

hence proved.

therefore option 2 is correct.

answered: Guest

la parábola es el lugar

geométrico en el cual los puntos tienen una distancia idéntica, equidistantes,

de un punto denominado foco, f, y una recta denominada directriz

el radio vector de una

parábola es el segmento que existe entre un punto cualquiera y el foco.

por la ecuación se observa

que la parábola abre hacia la derecha, por lo cual podemos usar las siguientes fórmulas

la ecuación ordinaria de la

parábola es y^2 = 4px, donde p es la longitud desde el vértice de la parábola al

foco.

la fórmula de la directriz

es x + p = 0

resolviendo:

y^2-9x = 0

y^2 = 9x

4p = 9, entonces p = 9/4

entonces el foco tendrá la

coordenada f(9/4,0)

la directriz vendrá

expresada por

x + p = 0

x = -p

x = -9/4

el problema indica que la

ordenada es igual a 6, entonces

(6)^2=9x

x = 36/9

x = 4

entonces el punto al cual

hay que obtener la distancia será p(4,6)

calculando se tendrá: pf =

pf = 6,25 u

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step-by-step explanation:

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What is the probability of choosing a blue marble out of a bag containing 3 red , 1 green , 4 blue ,...