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Aliun [14]
4 years ago
5

The probability that a student guesses the correct answer to a four-choice multiple-choice question is ​P(correct)=0.25. How man

y correct answers should a student expect to guess on a test with 52 four-choice multiple-choice​ questions?
A student should expect to guess _________ correct answers.
Mathematics
1 answer:
Pie4 years ago
8 0

Answer:

13

Step-by-step explanation:

Expected answer to be correct is 52*0.25 = 13

Since we know that 52 is the number of questions, and 0.25 is the probability of getting a correct answer we multiply them together to get the chance of getting correct answers.

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Please help I will be giving a brainliest to the first person to answer please help me​
lutik1710 [3]

Step-by-step explanation:

  1. -23 *5 = -115
  2. -8 * -15 = 120
  3. 75 * 6 = 450

Hope it helped

6 0
3 years ago
Read 2 more answers
Solve the triangle.
saw5 [17]

Answer:

Step-by-step explanation:

because <u>c</u> is shorter than<u> a</u> we know C is a smaller angle than A

so the first choice is out.

use the law of cosines to find b

b^{2} = a^{2} +c^{2} -2*a*c*cos(B)

b^{2} =1681+400-1326.787871

b^{2}= 754.21219

b= \sqrt{754.21219}

b= 27.46292

so the last choice looks good

5 0
3 years ago
Luca has a box of dog toys. There are 3 bones, 5 balls, and a stuffed animal. What is the ratio of balls to stuffed animals?
Anna007 [38]
The answer would be D. 1:5 since there is 1 stuffed animal and 5 balls.
5 0
3 years ago
Write a SIMPLIFIED inequality for x that would give a rectangle with a length of 4 meters and a width of x+7 meters an area of m
Rashid [163]

Answer:

128 > 4*(x + 7)

Step-by-step explanation:

Given the following data;

Length = 4 meters

Width = x + 7 meters

Area = 128 m²

Mathematically, the area of a rectangle is given by the formula;

Area of rectangle = length * width

Substituting into the formula, we have;

128 > 4*(x + 7)

128 > 4x + 28

128 - 28 > 4x

100 > 4x

Dividing both sides by 4, we have;

25 > x

5 0
3 years ago
Whast is the value of -3/4-(-3/8)?
olganol [36]

Answer:

- 3/8

Step-by-step explanation:

- 3/4  - (-3/8)

= -3/4 + 3/8

= -6/8 + 3/8

= - 3/8

4 0
3 years ago
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