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

What must the measure of the
angle marked yº be in order for the seat of the bench to be
parallel to the ground?

Answers

Answer:

Linear pair angle of 136 degree =180-136

=44

Therefore angle y is alternate angle of 44

Therefore angle y=44

Answer:

44

Step-by-step explanation:

180 - 136 = 44

solve for x
enter the solutions least to greatest
-x^2 -8=-33

Answers

Hello, the answer is 27478 also that is not correct I just need to get the points to ask

Answer:

[tex] \bf \huge ± 5 [/tex]

Step-by-step explanation:

Given :

- x^ 2 - 8 = - 33

to find :

find ''x''

explanation :

⟼ - x^ 2 - 8 = - 33

step 1 : add 8 to both sides

⟼ − x² − 8 + 8 = − 33 + 8

⟼ - x² = - 25

step 2 : Divide both sides by -1

⟼ - x² / - 1 = - 25 / - 1

⟼ x² = 25

step 3 : take square root

⟼ x² = 25

⟼ x = ± √25

⟼ x = ± 5

x = ± 5.

Find the area of the shaded figure

Answers

Answer:

its 56 units square.

Step-by-step explanation:

(count the tiles in the shaded figure, you'll get the area)

The measure of an angle is 83.4°. What is the measure of its supplementary angle?

Answers

Answer:

The supplementary angle is 96.6.

Step-by-step explanation:

Complementary angles make up to 90 degrees, but since this is a supplementary angle, it'll make up to 180 degrees. From there, you subtract 180-83.4 to get 96.6 degrees.

The radius of a cylindrical construction pipe is 2 ft. If the pipe is 17 ft long, what is its volume?
Use the value 3.14 for it, and round your answer to the nearest whole number.

Answers

Answer:

[tex]volume \: = \: \pi \times r {}^{2} \times length(height) \\ = 3.14 \times 2f \times 17ft \\ = 106.76ft {}^{3} [/tex]

Answer:

V = 106.76ft

Step-by-step explanation:

Cylinder Formulas in terms of r and h

Calculate the volume of a cylinder: V = πr2h

Calculate the lateral surface area of a cylinder (just the curved outside)**: L = 2πrh

Calculate the top and bottom surface area of a cylinder (2 circles): T = B = πr2

Total surface area of a closed cylinder is: A = L + T + B = 2πrh + 2(πr2) = 2πr(h+r)

Select the correct answer.
If the graph of f(x) = 4x is shifted 7 units to the left, then what would be the equation of the new graph?
A.
g(x) = 4x + 7
B.
g(x) = 4(x + 7)
C.
g(x) = 4(x − 7)

Answers

Answer:

g(x) = 4(x + 7)

Step-by-step explanation:

i had this on a test i just took so it told me it was right bit if it is not i am sorry and i will recheck

It would be B because when a graph is shifted left, it would be positive on the inside of the parenthesis. If it was shifting to the right, it would be negative

Answer this please i am stuck

Answers

Answer:

adasdasdadsads

Step-by-step explanation:

Answer:

its impossible

Step-by-step explanation:

Find the figure of the volume

Answers

Answer:

1300 ft

Step-by-step explanation:

to calculate volume you multiple LengthxHeightxWidth

20 x 13 x 5 = 1300

Help me pleaseeeeeeee

Answers

Answer:

10

Step-by-step explanation:

What is the volume of a hemisphere with a radius of 4.9 ft, rounded to the nearest
tenth of a cubic foot?

Answers

The volume of the hemisphere with the given value of radius to the nearest tenth is 246.4 cubic foot.

Hemisphere

A hemisphere is gotten when a sphere is cut into two equal halves.

The volume of a hemisphere is expressed as;

V = (2/3)πr³

Where r is the radius and π is pi ( π = 3.14 )

Given the data in the question;

Radius of the hemisphere r = 4.9ftVolume of the hemisphere V = ?

To determine the volume of the hemisphere, we substitute our values into the expression above.

V = (2/3)πr³

V = (2/3) × π × (4.9ft)³

V = (2/3) × π × 117.649ft³

V = 246.4ft³

Therefore, the volume of the hemisphere with the given value of radius to the nearest tenth is 246.4 cubic foot.

Learn more about volume of hemisphere here: https://brainly.com/question/3362286

use the pythagorean theorem to find the unknown side of the right triangle? hii does anyone know the hypotenuse length?

Answers

Answer:

17

Step-by-step explanation:

8^2 + 15^2 = c^2

64 + 225 = c^2

√289 = c

c = 17

Answer:

yes the answer is 17

Step-by-step explanation:

all you have to do for next time is a^2+b^2=C^2

a and b are legs or the lines that are connected to the right angle. the c is the hypotenuse which is always longer than the legs

Samuel saved some money for a new phone, but then he spent $24 of his savings on a
pair of headphones. Now he has $189 left. Let d be the number of dollars Samuel had
originally saved. Write and solve an equation to find d.

Answers

Answer:

213$

Step-by-step explanation:

24$ on headphones

189$ left

so you add the use and what is left an u get 213$ do not forget to write $ when u are finished :)

Rewrite the expression, the quotient of k decreased by 4 and 9, using the division symbol and as a fraction.​

Answers

Answer:

(k - 4) ÷ 9

(k - 4) / 9

Step-by-step explanation:

k decreased by 4 = k - 4

quotient of k decreased by 4 and 9

= (k - 4) ÷ 9 (using division sign)

Or

= (k - 4) / 9 (as a fraction)

Name That Meme!
-70 Points Correct answer get Brainiest

Answers

Answer:

BINGUSSSSSSSS

Step-by-step explanation:

UwU

Answer:

Bingus

Step-by-step explanation:

random guess

help m.e please please

Answers

Answer:

(-3, -4)

Step-by-step explanation:

The solution is where the two lines intersect. Therefore, the x-coordinate is -3, and the y-coordinate is -4.

Another way to solve this would be to set the to equations equal to each other, so 2x+2 = -4. Therefore, 2x = -6, and x = -3. And from the second equation, y = -4.

what is 100 + 84 – 62x = 494

Answers

Answer:

X= -5

Step-by-step explanation:

Good luck!

Answer:

X=-5

Step-by-step explanation:

100 + 84 - 62x =494

184 - 62x =494

494-184 = -62x

310 =-62x

310/-62 =x

X= -5

29 thanks and no links or you get reported

Answers

Answer:

$480.11 (C)

Step-by-step explanation:

$575.26 - $95.15 = $480.11

could someone give me answers for these three? no wrong answer or spam or link

Answers

Answer:

Equation: 2x + 13 = 5x - 20

x = 11

<FDG = 35

Step-by-step explanation:

These are vertical angles so they're equal to each other:

2x + 13 = 5x - 20

2x - 5x = -20 - 13

-3x = -33

x = 11

<FDG:

5x - 20

5(11) - 20

55 - 20

35

-2.5d ≥ 30
10-x ≤35
Please help thanks!

Answers

Answer:

1) d ≤ -12

2) x ≥ -25

Step-by-step explanation:

-2.5d ≥ 30

2.5d ≤ -30

d ≤ -12

10 - x ≤ 35

-x ≤ 25

x ≥ -25

7n; n=5?
I have no idea what the answer is, please help.

Answers

Answer:

35

Step-by-step explanation:

7n;n=5

7n

n=5

7×5=

n=35

Answer:

35

Step-by-step explanation:

so 7n; n=5

substitute the "n" attached to 7 with 5

so it would be 7 times 5 which equals 35

What is the Radius of a circle with an area of 115

Answers

6.05

Step-by-step explanation:

r=squareroot a/π= square root 115/π = 6.05

Emerson has some yellow stickers and some green stickers. She
has 30 green stickers and the ratio of vellow stickers to green
stickers is 2.5. How many yellow stickers does Emerson have?

Answers

answer:

12

explanation:


the ratio is 2:5 so we know that for every 5 green stickers, Emerson has 2 yellow stickers.

So, we know that 5 goes into 30 6 times so all you have to do is 6 x 2 = 12

Find the key features for m [x]=3x^2+13x-30

Answers

Answer:

x1= -6 and x2= 5/3

Step-by-step explanation:

good luck

Find the GCF of 4x3and7x5

Answers

Answer:

GCF of 4 x 3 should be 1

GCF of 7 x 5 should also be 1

Hope this helps, and sorry if it is incorrect, there isn't very much context to this question!

can anyone help with this??

Answers

Answer:

y=x+6

Step-by-step explanation:

the co-ordinate points are (-2,4)and (4,10) so y2-y1

                                                                           x2-x1    

10-4 =6

4-2    =6   which will be 1 as the gradient so you will form an equation

y-10 =1 cross multiply the values with one so the answer will be y-10=x-4

x-4  

take -10 to the other side it will be y=x-4+10 hence y= x+6

                                           

Solve using the standard algorithm. 82.14 ÷ 0.6 ≅

Answers

Answer:60

Step-by-step explanation:

the diagram shows a track composed of a rectangle with a semicircle on each end. the area of the rectangle is 4,000 square meters. what is the perimeter of the track?

Answers

Answer:14400

160

=

90

Step-by-step explanation: 90

π

=

90

π

 If you are using an approximation such as 3.14 for  

π

, multiply that by 90

Add  

160

2

to the circumference since the lengths of the rectangle are also part of the perimeter.

160

2

=

320

90

π

+

320

The function P(h)= 2h- 15 represents the profit a company makes selling h hot dogs. Which is the most appropriate domain of the function?
a : all positive intergers
b : all positive real numbers
c : all positive rational numbers
d : all positive irrational numbers

Answers

The requried most appropriate domain for the function P(h) would be the set of all non-negative real numbers. The domain is b, all positive real numbers.

What is a domain?

The domain is defined is a set of values of the independent variable for which there is a certain value of the dependent variable exists in the range of the function.

The function P(h) = 2h - 15 represents the profit a company makes selling h hot dogs. In general, the domain of a function represents the set of all possible input values for which the function is defined.

In this case, the function can be defined for any non-negative value of h, since the company can sell any number of hot dogs, including zero. However, the function may not be defined for negative values of h, since it does not make sense to talk about selling a negative number of hot dogs.

Learn more about the domain here:
https://brainly.com/question/28135761
#SPJ2



Use the ALEKS calculator to write as a percentage.
5/17
Round your answer to the nearest tenth of a percent.

Answers

Answer:

The answer is 29.4%

Step-by-step explanation:

The given is to be rounded to the nearest tenth percent so

5/17 = 0.294

0.294 * 100 = 29.4% since nearest tenth percent

The required answer is 29.4%

Given fraction is 5/17.

Percentage is a way of expressing a fraction or proportion as a portion of 100. It is a mathematical concept used to represent relative quantities or values in terms of hundredths. The word "percent" is derived from the Latin words "per centum," which mean "per hundred." It is denoted by the symbol "%".

To convert a fraction to a percentage, and multiply the fraction by 100.

Let a and b be the rel numbers. To convert the fraction a/b into percentage by multiply the fraction by 100.

That is , a/b x 100.

And on simplification gives the fractions.

To convert 5/17 to a percentage, we have:

(5/17) x 100 = 29.4117647...

Rounding this to the nearest tenth of a percent, we get:

29.4%

Therefore, when rounded to the nearest tenth of a percent, 5/17 is approximately 29.4%.

Learn more about converting fractions to percentages, click here:

https://brainly.com/question/25395

#SPJ6

Is the following relation a function? Please help

Answers

No because if you do the vertical line test, it will go through two parts of the circle instead of one.

Answer:

No it is not a function.

Step-by-step explanation:

It goes through 2 points not 1.

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