On a multiple-choice test, a student has four possible choices for each question. The student receives 1 point for a correct answer and loses ¼ point for an incorrect answer. If the student has no idea of the correct answer for a particular question and merely guesses, what is the student's expected gain or loss on the question? Suppose you were using an

Answers

Answer 1

Answer:

1 / 16

Step-by-step explanation:

Number of options = 4

Number of correct answers = 1

Number points gained for a correct answer = 1

Number of points lost for an incorrect answer = 1/4 = 0.25

Probability of choosing a correct option = 1/4

Probability of choosing an incorrect option = 3/4

x ____ 1 ______ - 1/4

P(x) __ 1/4 ______ 3/4

Expected gain or loss :

E(x) = Σx*p(x)

E(x) = (1 * 1/4) + (-1/4 * 3/4)

E(x) = 1/4 - 3/16

E(x) = (4 - 3) / 16

E(x) = 1 /16

A gain of 1/16


Related Questions

Use the function below to find F(2).
F(t) = 2x1/2^3t
ОА. 1/32

O B.1/8

O c.1/16

O
D.1/64

Answers

Answer:

C

Step-by-step explanation:

A line with a slope of -2 is written in the form y=mx+b.
what is the value of b If the line passes through the point (5,-7)?​

Answers

Answer:

b = 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + b ( m is the slope and b the y- intercept )

Here m = - 2 , then

y = - 2x + b ← is the partial equation

To find b substitute (5, - 7 ) into the partial equation

- 7 = - 10 + b ⇒ b = - 7 + 10 = 3

11/3 can be thought of as a whole number and a fraction.

Complete the statements below to show the number of wholes and the fractional part that make up 11/
3.

Answers

11/3 = 3 2/3 as a mixed fraction or proprr fraction

Use the distributive property to write an expression that is equivalent to 12 + 4x.

Answers

Answer:

10+2+4x

Step-by-step explanation:

its very simple but still right because 10 and 2 is 12 and well 12+4x is the thing you want to have the same as

Write an equation for the line parallel to the given line that contains C.
C(1,4)​; y=−3x+1

Answers

Answer:The equation of a line is y = mx + b where y = y-coordinate, m = slope, x = x-coordinate, and b = y-intercept. (Remember that the slope is the steepness  of a line and the y-intercept is the point where the line intersects  the y-axis. The x- and y-coordinates are values of the points on the line of y = 3x - 1.)

Step-by-step explanation:

HELP ASAP PLEASE!
Write a rule for the sequence.
4, 8, 16, 32, ...

Start with 4, and multiply by 2 repeatedly.
Start with 4, and add 8 repeatedly.
Start with 4, and add 2 repeatedly.
Start with 2, and multiply by 4 repeatedly.

Answers

start with 4 and multiply by 2 repeatedly

i will give brainiest 1!!!!!!!

What is x(5-2)(2-2)=12

Answers

Answer: No solution

x(5-2)(2-2)=12

x(3)(0)=12

Since its times by 0 the x goes away and it is

0=12

No solution

Answer:

0=12

Step-by-step explanation

(5−2)(2−2)=12

(3)(2−2)=12

In the last 150 years, the average height of people in the industrialized nations has increased by 1/3 foot. Today, American men have an average height of 5 7/12 feet. What was the average height of American men 150 years ago? show your work

Answers

Answer:

5 1/4 feet

Step-by-step explanation:

Average height now:

5 7/12 feet

The difference:

1/3 foot

Average height 150 years ago:

5 7/12 - 1/3 = 5 + 7/12 - 4/12 =5 + 3/12 =5 + 1/4 =5 1/4 feet

A certain computer can perform a maximum number of
operations per second. If this computer is running at 25% of
the maximum and is performing 100 operations per second,
what is the maximum number of operations the computer can
perform per second?

Answers

Answer:

I believe the answer is 400 operations per second.

Step-by-step explanation:

Hi! Please help out if you can to explain it! I need so much help on this !

Answers

Step-by-step explanation:

When you translate something, it means to move it exactly as it is from once location to another. In this case, move the object 3 units right, and 3 units up. Each line segment is 1 unit. To translate this object, move each point 3 unit up and 3 units right. After that, connect the points to draw the object.


Monique went on a hike in the hills. The table
displays the times and distances from the beginning to
the end of the hike.
If Monique hiked at a constant pace, which equation
shows the relationship between the length of the time
she hiked and the distance she hiked?
A. d= 6t
B. d = 4.8t
C. d= 12.5t
D. d= 0.087

Answers

Answer:

I believe it is A, d= 6t

It is an odd question though.

The sum of Paul’s and Sam’s ages is 4 and the difference between their ages is 0. Two equations to model this situation are x + y = 4 and x - y = 0. The solution represents both of their ages. What quadrant does the solution lie in?

A.) IV
B.) II
C.) III
D.) I

Answers

Answer:

D.) |.

Step-by-step explanation:

x + y = 4

x - y = 0      Adding:

2x + y - y = 4

2x = 4

x = 2

and y = 4 - 2 = 2.

The point (2, 2) is in quadrant |

What is the value of x in the figure?

Answers

Answer:

34

Step-by-step explanation:

This is because the whole angle is a right angle and equals 90°. You subtract 56 from 90 and get 34. Hope this helped you out!!

Answer:

i am pretty sure 34 (degrees)

Step-by-step explanation:

tell me if this is wrong.


84 km
35 km
What is the length of the hypotenuse?

Answers

Answer:

Hypotenuse is 91 km

Step-by-step explanation:

a² + b² = c²

35² + 84² = c²

1225 + 7056 = c²

c² = 8281

[tex]\sqrt{c^2} =\sqrt{8281}[/tex]

c = 91

growth or decay pls answer

Answers

Answer:

exponential decay because the base is less than one

Step-by-step explanation:

Use a Pythagorean Triple to find x.

Answers

Answer:

x = 51

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

x² = 45² + 24² = 2025 + 576 = 2601 ( take the square root of both sides )

x = [tex]\sqrt{2601}[/tex] = 51

Answer:

x = 51.

Step-by-step explanation:

The triple you require is 17-15-8

We have x-45-24

- that is three times each number in the triple.

So x = 3*17 = 51.

1. x2 + 9x + 20

2. x2 + 7x + 12

3. x2 + 8x + 15

4. x2 + 7x + 12

5. x2 + 11x + 10

6. x2 + 7x + 6

7. x2 + 5x + 4

8. x2 + 10x + 21

9. x2 + 10x + 16

10. x2 + 10x + 9

11. x2 + 12x + 20

12. x2 + 15x + 14

13. x2 + 13x + 42

14. x2 + 9x + 18

15. x2 + 16x + 60

Answers

Answer:

1) (x+5)(x+4)

Step-by-step explanation:

HELPPPPP MEE ITS DUE TODAY pleasseee​

Answers

Angle 2 is 74, angle 1 is 47 ( since vertical angles are congruent), and angle 3 is 69.

The four partners in a business decide to split the profits of their company in the ratio 2 : 3 : 3 : 5 .
If the profit one year is $26, 000, then what is the largest amount of profit received by one of the four partners?

Answers

Answer:

$10,000

Step-by-step explanation:

the profit was divided to 2+3+3+5=13 parts

the largest amount of profit

=$26,000×5/13

=$10,000

find the volume of the cylinder!



Use 3.14 for pi-

round your answer to the tenths place !!


Will mark b if correct:)

Answers

2123.72 cm


(sorry if it’s wrong)

The regular price of a pair of Rothy's (water bottle shoes) is $145. They are on sale for 38% off. What is the sale price?

Answers

Answer:

$89.90

Step-by-step explanation:

38% corresponds to the decimal fraction 0.38.  

The amount of the discount is 0.38($145), or $55.10.  Subtracting this amount from the regular price yields $145 - $55.10 = $89.90.

A faster way of doing this problem is to subtract 0.38 from 1.00, obtaining 0.62, and then multiplying $145 by this 0.62:  $89.90.

I dont know what is the missing number 6 x ? x 3 = 90

Answers

6 times 5 equals 30 and 30 times 3 is 90 so 5 is your answer

what is the general rule of the following geometric sequence

-4; -1; -1/4​

Answers

Answer:

Each of these numbers is divided by four to get the next number in the sequence, so the rule of this would be divide by 4.

Step-by-step explanation:

-4/4 is -1, -1/4 is -1/4 (negative one-fourth), and so on.

1.2 career planning financial algebra

Answers

Needs more info about your question please

Solve for x
4/x = 2/7

Answers

the answer is 14

x=14

$9000.00 decreased by 0.5% make sure to show your work

Answers

Answer: 8550

Step-by-step explanation:

9000(1-0.5)

9000(0.95)

8550

can someone please help me asap ill give extra brainly points!!!

Answers

95.20 is the answer

Answer:

94.20 yds

Step-by-step explanation:

C = 2 pi r

     2 pi (15) = 94.20 yds

NO LINKSS!!! HELPP ME PLSSSSSSS I NEED IT NOW PLSSS. How could you calculate the x-coordinate of the midpoint of a horizontal
segment with endpoints at (0,0) and (20,0)?

Answers

Answer:

the answer I say would be correct would be D

30 points. Can you please solve this?

Answers

Answer:

43 glasses with 4 fluid ounces in the last glass

Step-by-step explanation:

156+192= 348

348÷8=43 1/2 glasses 43 full glasses and 4 fl ounces leftover

what does 2x+2y=7 equal to

Answers

Let's solve for x.
2
x
+
2
y
=
7
Step 1: Add -2y to both sides.
2
x
+
2
y
+

2
y
=
7
+

2
y
2
x
=

2
y
+
7
Step 2: Divide both sides by 2.
2
x
2
=

2
y
+
7
2
x
=

y
+
7
2



Let's solve for y.
2
x
+
2
y
=
7
Step 1: Add -2x to both sides.
2
x
+
2
y
+

2
x
=
7
+

2
x
2
y
=

2
x
+
7
Step 2: Divide both sides by 2.
2
y
2
=

2
x
+
7
2
y
=

x
+
7
2
Answer:
y
=

x
+
7
2

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