1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svetlana [45]
2 years ago
13

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

Mathematics
1 answer:
Nezavi [6.7K]2 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

You might be interested in
A student obtain 85 ,90,95,100and 75 in his maths test (1). What is the average of his test grades?
netineya [11]

Answer:

89.

Step-by-step explanation:

There are 5 scores.

So the Average = (85 + 90+95+100+ 75)/5

= 445/5

= 89.

8 0
2 years ago
Read 2 more answers
In angle ABC the measure of Angle B is 13 more than the measure of Angle A and the measure of angle C is 9 less than twice the m
alisha [4.7K]

Answer:

its b

Step-by-step explanation:

its

3 0
2 years ago
Find f(t – 3) for f(x) = 4x2 – 8x + 4.
GarryVolchara [31]

Answer:

4t^2 - 32t + 64.

Step-by-step explanation:

f(x) = 4x2 – 8x + 4

f(t - 3) = 4(t - 3)^2 - 8(t - 3) + 4

= 4(t^2 - 6t + 9) - 8t + 24 + 4

= 4t^2 - 24t + 36 - 8t + 28

=  4t^2 - 32t + 64.

5 0
3 years ago
At 10:05 a.m., there are 2 microscopic bacteria cells in the bottle. At 10:15 a.m., there are 8 cells in the bottle. At what tim
igomit [66]
11:45 it will have 66 ?? so I don’t know hope that helps
6 0
3 years ago
Read 2 more answers
A school debate team has four girls and six boys. A total of four of the team members will be chosen to participate in the distr
alex41 [277]
Procedure:

1) calculate the number of diferent teams of four members that can be formed (with the ten persons)
2) calculate the number of teams tha meet the specification (two girls and two boys)
3) Divide the positive events by the total number of events: this is the result of 2) by the result in 1)

Solution

1) the number of teams of four members that can be formed are:

10*9*8*7 / (4*3*2*1) = 210

2) Number of different teams with 2 boys and 2 girls = ways of chosing 2 boys * ways of chosing 2 girls

Ways of chosing 2 boys = 6*5/2 = 15
Ways of chosing 2 girls = 4*3/2 = 6

Number of different teams with 2 boys and 2 girls = 15 * 6 = 90

3) probability of choosing one of the 90 teams formed by 2 boys and 2 girls:

90/210 = 3/7
 
7 0
3 years ago
Other questions:
  • Hokiris ladder has two legs that are each 8 feet long. When the ladder is opened safely and locked for use, the legs are 4 feet
    8·1 answer
  • If I have 44 ounces of drink, and 12 oz in each bottle, how many bottles can I fill
    6·1 answer
  • What is the inverse of the function f(x) =2x-10
    9·2 answers
  • Jill’s bowling scores are approximately normally distributed with mean 170 and standard deviation 20, while Jack’s scores are ap
    6·1 answer
  • If you get a jacket thast 86 dollars and you get 15% off and another 5% off how much is it
    14·1 answer
  • Each number is a factor of the number <br> 2 3 6 9<br> which number could be the the number
    6·1 answer
  • Solve this expression:-4x\15=9
    9·1 answer
  • Identify the domain and range of each of the graphs below.
    15·1 answer
  • Un comerciante compra una pieza de 45m
    13·1 answer
  • Looking for the steps to determine how 2 - 3x = -x - 8
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!