A test has multiple choice questions with 3 choices for each answer; only one answer is correct for each question. Suppose a student guesses the answer to each question. Assuming the guesses are independent, find the probability that the student will guess correctly when answering two questions.

Answers

Answer 1

Answer:

a

Step-by-step explanation:


Related Questions

I need help!!!!!!!!???!!!!!!!!??

Answers

Its 27 if you’re adding at the bottom, but I cant really tell since it’s cropped

hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello

Step-by-step explanation:

hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello hello

ILL GIVE YOU BRAINLIEST IF YOU GET IT RIGHT AND EXPLAIN
A circular walkway surrounds a fountain.The fountain alone has a diameter of 16 feet.The walkway adds an additional 4 feet to each side. What is the area of the walkway minus the area of the fountain. Use 3.14 for Pi.​

Answers

Answer:

a = 452.16 ft²    area of walkway

a = -351.68 ft²   area of the walkway minus the area of the fountain

Step-by-step explanation:

Area fountain

a = π16²

a = 256π

Area fountain and walkway

a = π(16 + 4)²

a = π20²

a = 400π

Area Walkway

a =400π - 256π

a = 144π

a = 144 * 3.14

a = 452.16 ft²

------------------------------

I think the Area of the Walkway is what the question should be asking for, but it asked for

"the area of the walkway minus the area of the fountain"

a = 144π - 256π

a = -112π

a = -112 * 3.14

a = -351.68

The lines shown below are parallel. If the green line has a slope of -3/7, what is
the slope of the red line?

Answers

Answer:

-3/7

Step-by-step explanation:

Parallel lines have the same slope

If the green line has a slope of -3/7, the red line has a slope of -3/7

Blank is 10 times the value of 70

Answers

Answer:

10x70=700

Step-by-step explanation:

Answer:

700

Step-by-step explanation:

7 x 10 = 700

need help with this question

Answers

Answer:

the anwser is b

Step-by-step explanation

you need to replace the letters with the numbers and youll see

Which figure has at least one line of symmetry?

Answers

Answer:

it the first diagram for this question.

Need assistance in processing this equation?

Answers

Where’s the equation??

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 70 mph. The westbound train travels at 90 mph. How long will it take for the two trains to be 192 miles apart.

Answers

Answer:

1.2 hours

Step-by-step explanation:

Recall :

Distance = speed * time

Let the time taken = x

Creating an equation for the question :

Distance of train A + Distance of train B = 192

70 * x + 90 * x = 192

70x + 90x = 192

160x = 192

x = 192 / 160

x = 1.2

It takes 1.2 hours to be 192 miles apart.

can someone help me with this​

Answers

Answer:

1 4/5

Step-by-step explanation:

9/11 ÷ 5/11

Copy dot flip

9/11 * 11/5

Rewriting

9/5 * 11/11

9/5

Changing to a mixed number

5 goes into 9 1 time with 4 left over

1 4/5

Find the circumference of the circle shown below if the diameter equals 20 inches. Use 3.14 for π

A)62.8
B)31.4
C)None of these answers
D)1,256
E)314

Answers

Answer:

62.8 inches

Step-by-step explanation:

c = πd

c = 3.14 * 20

c = 62.8 inches

Find the indicated area of the sector surrounded in bold.

Answers

Answer:

75.36 yd² (≈ 75.4 yd²)

Step-by-step explanation:

GIVEN :-

Angle subtended by the arc at center of circle (θ) = 135°Radius of the circle = 8 yd

TO FIND :-

Area of the sector

GENERAL FORMULAE TO BE USED IN THI QUESTION :-

Lets say there's an arc which subtends θ angle in the center of the circle & radius of the circle is 'r'.

Area of the sector = [tex]\frac{\theta}{360} \times \pi r^2[/tex]

SOLUTION :-

Area of the sector = [tex]\frac{\theta}{360} \times \pi r^2[/tex]

                              [tex]= \frac{135}{360} \times \pi (8)^2[/tex]

                              [tex]= \frac{3}{8} \times 64 \times 3.14[/tex]

                              [tex]= 3 \times 8 \times 3.14[/tex]

                              [tex]=75.36 \; yd^2[/tex]

Camden is creating a model of a pyramid. The model created will need to be scaled up from the blueprint.

If segments DE and AB are parallel, which of the following expressions will help Camden determine the length of DC?
DC equals EC times AC all over BC
DC = EC
DC equals EC times AC all over AB
DC = AB

Answers

Answer:

A) DC equals EC times AC all over BC.

Step-by-step explanation:

We know that:

[tex]DE\parallel AB[/tex]

Then by corresponding angles:

[tex]\angle CAB\cong \angle CDE\text{ and } \angle CBA\cong \angle CED[/tex]

So, by AA-Similarity:

[tex]\Delta CDE\sim \Delta CAB[/tex]

Corresponding sides of similar triangles are in proportion. Hence:

[tex]\displaystyle \frac{DC}{AC}=\frac{EC}{BC}[/tex]

By multiplying both sides by AC:

[tex]\displaystyle DC=\frac{EC\cdot AC}{BC}[/tex]

DC is equal to EC times AC over BC.

Hence, our answer is A.

Answer:

 DC equals EC times AC all over BC

Step-by-step explanation:

I need answers to, tan x = 23/41 and sin x = 23/45

Answers

Answer:

See below. Remember to take the inverse trig function of both sides!

Step-by-step explanation:

The solution to [tex]tanx=\frac{23}{41}[/tex] is [tex]x=tan^{-1}(\frac{23}{41})=29.29136217^\circ[/tex]

Similarly, the solution to [tex]sinx=\frac{23}{45}[/tex] is [tex]x=sin^{-1}(\frac{23}{45})=30.73786867^\circ[/tex]

A building 230 feet tall casts a 80 foot long shadow. If a person looks down from the top of the building, what is the measure of the angle between the end of the shadow and the vertical side of the building (to the nearest degree)? (Assume the person's eyes are level with the top of the
building.)

Answers

Hope this help!!!

Have a nice day!!!

The angle between the end of the shadow and the vertical side of the building is approximately 70.4°.

How to calculate the angle?

The tangent function to find the angle between the end of the shadow and the vertical side of the building. Let x be the measure of the angle, in degrees. Then:

tan(x) = opposite/adjacent

tan(x) = 230/80

tan(x) = 2.875

To solve for x, we take the inverse tangent of both sides:

x = tan⁻¹(2.875)

x ≈ 70.4

Therefore, the angle between the end of the shadow and the vertical side of the building is approximately 70.4°.

To know more about an angle follow

https://brainly.com/question/13959018

#SPJ2

Find the area of the figure described

Answers

Answer:

153.94

Step-by-step explanation:

A=πr2=π·72≈153.93804

hope this helps!

please mark brainiest<3

Combine like terms and solve: 17x - 3x +8 *

Answers

Answer:

14x+8

Step-by-step explanation:

Answer:

14x+8

Step-by-step explanation:

x is a like term here so we can do 17x-3x

17x-3x=14x. 8 has no like terms so it will be 14x+8

There are 924 people in a theatre.
383 of the people are men.
356 of the people are women.
2
of the children are boys.
5
Work out how many girls are in the theatre

Answers

[tex]924 - (383 + 356 + 2 + 5 )[/tex]

Answer:

Step-by-step explanation:

total no. of people in the theatre = 924

men=383

women=356

boy children =2

doing workout 5

total=746

no. of girls= 924-746=178

Therefore, the number of girls are in the theatre are 178.

She got the given variable

Answers

Answer:

125 ov?/70*5

Step-by-step explanation:

Answer:

11

Step-by-step explanation:

70+5f=125. [exterior angle is equal to sum of interior opposite angles]

5f=125-70

5f=55

f=11

how do i solve this?

Answers

Answer:

5[tex]\sqrt{3}[/tex]

Step-by-step explanation:

This is a special right triangle, the side length that sees 30 degrees is equal to 5 then the side length that sees 90 degrees is 10 and the side length that sees angle measure 60 degrees is 5[tex]\sqrt{3}[/tex]

m23 is (3x + 4)º and mz5 is (2x + 11)
Angles 3 and 5 are
p
12
4
can be
w/
The equation
used to solve for x.
O
56
78
m25 =
V

Answers

9514 1404 393

Answer:

same-side interior(3x +4) +(2x +11) = 18077°

Step-by-step explanation:

Angles 3 and 5 are on the same side of the transversal, between the parallel lines, so can be called "same-side interior angles". These are also called "consecutive interior angles". As such, they have a sum of 180°, so are also "supplementary angles." We don't know what your pull-down menu options are, but perhaps one of these descriptions is on there.

__

Because the angles are supplementary, their sum is 180°. So, the equation ...

  (3x +4)° +(2x +11)° = 180°

can be used to solve for x. Likewise, any of the possible simplifications of this can be use:

  (3x +4) +(2x +11) = 180 . . . . . divide by degrees

  5x +15 = 180 . . . . . . . . . . . collect terms

  5x = 165 . . . . . . . . . . . . . subtract 15

  x = 33 . . . . . . . . . . . . . . divide by 5

__

Once we know that x=33, then the measure of angle 5 is found from its expression:

  m∠5 = (2x +11)° = (2·33 +11)°

  m∠5 = 77°

if you get this right i’ll give the brainliest answer

Answers

Answer:

[tex]c=108.17[/tex]

Step-by-step explanation:

Use Pythagoras theorem to find the hypotenuse:

[tex]c^{2} =a^{2} +b^{2}[/tex]

In this question, take "b" as 90' and "a" as 60'

[tex]c^{2} =60^{2} +90^{2}[/tex]

[tex]c^{2} =3600+8100[/tex]

[tex]c^{2} =11700[/tex]

[tex]c=\sqrt{11700}[/tex]

[tex]c=108.1665383[/tex]

[tex]c=108.17[/tex]

I hope this helps.....

Susie works as a mail clerk. She earns 8.125 and hour and worked 35.525 hours last week. What is her straight time pay

Answers

Answer:

Total pay=$288.64

Step-by-step explanation:

Giving the following information:

Hourly rate= $8.125

Number of hours worked= 35.525

To calculate the total pay of the week, we need to use the following formula:

Total pay= hourly rate * number of hours worked

Total pay= 8.125*35.525

Total pay=$288.64

questions 1 and 2, please

Answers

Answer:

too blurry cant read it

Step-by-step explanation:

.........................................................


Some of the values of a linear function are given in the table below. Which of the following could be the graph of the function?

Answers

Answer:

The graphs are included, but the table is missing.

Step-by-step explanation:

Sarah’s meal cost $28.80 without tip how much will she pay including 25% tip

Answers

Answer:

$ 36.00

Step-by-step explanation:

Tip Total: $ 7.20

Total (Bill + Tip): $ 36.00

Did I answer this correctly? Drag each tile to the correct box. Not all tiles will be used. Arrange the steps to solve this system of linear equations in the correct sequence.

Put the following in order:
A. Subtract 3x + 3y = -6 (obtained in step 1) from 2x – 3y = -9 (given) to solve for x.

B) Substitute the value of x in the first equation (x + y = -2) to get y = 1.

C) The solution for the system of equations is (-3, 1).

D) x = -15

E) The solution for the system of equations is (-15, 13).

F) Add 3x + 3y = -6 (obtained in step 1) to 2x – 3y = -9 (given), and solve for x.

G) x = -3

H) Substitute the value of x in the first equation (x + y = -2) to get y = 13.

J) Multiply the first equation by 3: 3(x + y) = 3(-2) 3x + 3y = -6.

Remember that only 5 can be used.

Answers

9514 1404 393

Answer:

  your 3rd step should be x = -3

Step-by-step explanation:

When you combine the equations in step 2, you get ...

  5x = -15

Dividing by 5 gives the solution for x:

  x = -3

This is what your Step 3 should show. This is the value that is consistent with the remaining steps.

Answer:9514 1404 393

Step-by-step explanation:

Choose the appropriate condition for the following pairs of triangles to be congruent.

Answers

Answer:

1. ASA, 2. SSS, 3. ASA

Step-by-step explanation:

1. It is given to us that these two triangles share two of the same angles. We can also see that they share a side together. 2 angles and a side means ASA.

2. It is given to us that these two triangles share two of the same side lengths. We can also see that they share a side together. 2 sides gives us SSS.

3. It is given to us that these two triangles share 1 of the same angles and 1 of the same side lengths. We can also see that they share a vertical angle, which by definition means they have the same measurement. 2 angles and a side gives us ASA.

Can anyone explain step-by-step please?




Answers

Answer:

i hope this helps:)

Step-by-step explanation:

William has three $10 bills and four $1 bills in his wallet. What is the probability that he will reach into his wallet twice and pull out a $10 bill each time? Assume he does not replace the first bill when he pulls out the second one.

Answers

Answer:

Step-by-step explanation can’t because he might pull out more than 10 dollars or less than 10 dollars.

if cosø = -5/13 and sin ø<0 what is tan ø

Answers

Answer:

12:5

Step-by-step explanation:

Other Questions
What did Adam encourage Daniel to do? the table shows the varying prices of microphones sold at makes music machine prices of microphones (dollar's) 25,28,20,22,32,28,35,34,30,36part bthe table shows varying prices at macks music machine. find the mean absolute deviation of the data show your work What is the best description of the message of this political cartoon? Giving women the right to vote will cause problems and humiliate men. Giving women the right to vote will help relieve men of the burden of power. When women gain the right to vote, the country will benefit in many ways. Women gaining the right to vote will have little impact, positive or negative. Whats the surface area of a cube whose volume is 1664?? A train starts from rest and accelerates uniformly until it has traveled 5.6 km and acquired a forward velocity of The train then moves at a constant velocity of for 420 s. The train then slows down uniformly at until it is brought to a halt. The acceleration during the first 5.6 km of travel is closest to which of the following?a. 0.19 m/s^2b. 0.14 m/s^2c. 0.16 m/s^2d. 0.20 m/s^2e. 0.17 m/s^2 When g(x) = 3x, what is g(5)? Which expression is equivalent to(X^1/4 y^16)^1/2? Which parts of a bike work together as a subsystem? How? The midpoint of segment AB is (6,5). The coordinates of point A are (7,10). Find the coordinates of point B. Answer options: (5,10) (8,15) (-3,7) The movement of earths surface causes What are the coordinates of the point on the directed line segment from (1,6) to (8,8) that partitions the segment into a ratio of 4 to 3? A police car in hot pursuit goes speeding past you. While the siren is approaching, the frequency of the sound you hear is 5500 Hz. When the siren is receding away from you, the frequency of the sound is 4500 Hz. Use the Doppler formula to determine the velocity of the police car. Use vsound=330 m/s.What is the velocity v of the police car ? Hank attends a focus group where he and five other men are asked to rate each of three lawn mowers. Hank knows a lot about lawn mowers. He is certain that lawn mower A is superior and deserves the highest rating. However, the rest of the men say that lawn mower B is the best. If Hank ends up publicly agreeing with the rest of the group, he has probably succumbed to __________. are fireworks flat or round asking for fun :P f(x) = 3x + 10f(x)-3-2-1-4 es la flesta?Es el sbado por la noche.A. QuB. DndeC. CmoD. Cuando All of the following are true of measuring the effectiveness of security policies, except: A. you can get a basic understanding if individuals are being held accountable for adherence to security policies by examining policy violations, incidents, and security awareness. B. measuring accountability is easier than measuring effectiveness. C. the best measurement of whether employees are following policies is the actual reduction in risk that occurs. D. to ensure accountability, you need to measure if employees are following the policies. Erin's jewelry box is in the shape of a rectangular prism. The measurements of the jewelry box are length 5 in, width 10 in, and height 3 in. What is the surface area of Erin's jewelry box? A 3.00-kg crate slides down a ramp. the ramp is 1.00 m in length and inclined at an angle of 30.08 as shown in the figure. The crate starts from rest at the top, experiences a constant friction force of magnitude 5.00 N, and continues to move a short distance on the horizontal floor after it leaves the ramp. i need help finding m