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svetlana [45]
3 years ago
13

Si en un examen 27 preguntas son correctas el 90%, cuántas preguntas son en total?​

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
5 0

Respuesta:

30

Explicación paso a paso:

Número total de preguntas = 100%

Número de preguntas correctas = 27

Porcentaje de aciertos = 90%

Por eso,

Si 90% = 27

Luego ; 100% = x

Multiplicar en cruz:

0,9 veces = 27

x = 27 / 0,9

x = 30

Número de preguntas = 30

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Gekata [30.6K]

The answer is

T= 5j+s+2


4 0
4 years ago
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Tom plants 3 seeds.
Rasek [7]

Answer:

A. 64/125

B. 124/125.

Step-by-step explanation:

A).  As the events ( germinate or not germinate) are independent we multiply the probabilities.

Prob(All seeds germinate) = 4/5*4/5*4/5 =  64/125.

B). Probability of at least one germinating =  1 - probability that none germinate

Probability of  1 seed not germinating = 1 -45 = 1/5.

So Prob(at least one germinating)

= 1 - (1/5 * 1/5 * 1/5)

= 1 - 1/125

= 124/125.

5 0
3 years ago
A) y= 3x + 10<br> B) y= 3x + 60<br> C) y= 4x + 5<br> D) y= 4x + 35
Afina-wow [57]

Answer:

d or a

Step-by-step explanation:

50/55/100/105/.................

6 0
3 years ago
I need help please help me :(
zalisa [80]
EXPLANATION:
10 - ( 3 + 2*2 ) + 4
=> 10 - ( 3 + 4 ) + 4
=> 10 - 7 + 4
=> 3 + 4
=> 7

ANSWER: A. 7

Hope it helps u!
6 0
3 years ago
Pls answer quick I will give bainlyest to first GOOD answer
Helen [10]

Answer:

R1 - given

R2 - subtraction property of equality

R3 - distribution

S4 - 9x = 61

R5 - division prop. of equality

Step-by-step explanation:

hope this helps :)

5 0
3 years ago
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