At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55% chance they will get a B or higher on the tests. If they do not study, there is a 20% chance that they will get a B or higher on the tests. The professor knows from prior surveys that 60% of students study for the tests. The probabilities are displayed in the tree diagram.


A tree diagram. Random student studies for test is 0.6, and does not study for test is 0.4. Studies for test to Gets B or higher is 0.55; does not get B or higher is 0.45. Does not study for test to Gets B or higher is 0.20; does not get B or higher is 0.80.


The professor informs the class that there will be a test next week. What is the probability that a randomly selected student passes the test with a B or higher?


0.33

0.41

0.55

0.75

Answers

Answer 1

Answer:

i think it is 0.33 probably wrong

Step-by-step explanation:

i  am proably wrong


Related Questions

4/10x 6/4 x 2/3=

Product:


Reduced answer:

Answers

( ( 4 /10 x)(6) /4 x)(2) /3

Product:  2 /5 x^2

Simplified: You can't simply that.

(I hope this is correct, correct me if I'm wrong.)

Rent it right rents compact cars for $38 per day plus $0.15 per mile. Lucia rented a car for 3 days and was charged $150. How many miles did she drive?

Answers

Answer:

240

Step-by-step explanation:

first 38 times 3 = 114

second 150-114= 36

third 36/0.15= 240

answer is 240

a doll maker puts a small bag of 5 hair ribbons inside each box with a doll how many bags of 5 hair ribbons can be made from 45 hair ribbons

Answers

Answer:

divide 45 by 5

you get 9

the answer is 9

Answer:

45 / 5 = 9

Step-by-step explanation:

this.is your answer it's quite simple if u need more help lmk

Find the equation (in terms of x) of the line through the points ( − 1 , − 1 ) and( 4 , − 4 )

Answers

Answer:

[tex]y = -\frac{3}{5}x -\frac{8}{5}[/tex]

Step-by-step explanation:

Given

[tex](x_1,y_1) = (-1,-1)[/tex]

[tex](x_2,y_2) = (4,-4)[/tex]

Required

Determine the line equation

First, calculate the slope (m)

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

[tex]m = \frac{-4 - (-1)}{4 - (-1)}[/tex]

[tex]m = \frac{-4 +1}{4 +1}[/tex]

[tex]m = \frac{-3}{5}[/tex]

[tex]m = -\frac{3}{5}[/tex]

The equation is then calculated using:

[tex]y - y_1 = m(x - x_1)[/tex]

This gives:

[tex]y - (-1) = -\frac{3}{5}(x - (-1))[/tex]

[tex]y + 1 = -\frac{3}{5}(x +1))[/tex]

Open bracket

[tex]y + 1 = -\frac{3}{5}x -\frac{3}{5}[/tex]

Make y the subject

[tex]y = -\frac{3}{5}x -\frac{3}{5}-1[/tex]

[tex]y = -\frac{3}{5}x +\frac{-3-5}{5}[/tex]

[tex]y = -\frac{3}{5}x +\frac{-8}{5}[/tex]

[tex]y = -\frac{3}{5}x -\frac{8}{5}[/tex]

PLEASE HELP QUICKLY !!!!!!!!!!!!!! I will give brainliest

Answers

t=100 I was not sure about y sowyy

You apply the
{Select)
operation
[ Select ]
-for multiplication equations and
[ Select ]
for division equations
-to
[ Select ]
of the equation.

Answers

Answer:

ndhduejcijgisjcidjcjzjfjidjicjdici djcojzifcjdjcu

Step-by-step explanation:

no se weydgfds

Shrina has read 10% of the books that are in the library. She has now read 327 books.

How many books are there in the library?

Answers

134 hope I helps with ur problem

you deposit 3,800 in an account with an annual interest of 5.2% for 20 years

Answers


First, convert R percent to r a decimal
r = R/100
r = 5.2%/100
r = 0.052 per year,

Then, solve our equation for A
A = P(1 + r/n)nt
A = 3,800.00(1 + 0.004333333/12)(12)(20)
A = $ 10,726.90

5x5=? someone help please

Answers

Answer:

25

Step-by-step explanation:

25


explanation : 5 5 5 5 5

HELP ME WITH ALL OF THESE ASAP i will give BRAINEST

Answers

Answer:

The first is true.

8 · 21 = 168

The second is false.

The third is false.

The fourth is true.

Step-by-step explanation:

Answer:

true

168 divided by 21 is 8

true

168 divided by 8 is 21

false

168 divided by 16 is 10.5

false

168 divided by [tex]\frac{1}{8}[/tex] is 21

Step-by-step explanation:

for number one since there 21 cans of soup and 168 oz are used for all cans you would divide 168 by 21 and you get 8 and so on with the rest of the questions !

Meaning of part of a whole

Answers

Answer:

Step-by-step explanation:

a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house;to glue the two parts together.

Please thank me!

Describe how a point on a graph is related to a table and an equation that represent the same relationship.

Answers

Answer:

because everything is relative to each other.

Step-by-step explanation: Graphing ordered pairs is only the beginning of the story. Once you know how to place points on a grid, you can use them to make sense of all kinds of mathematical relationships. A linear relationship is a relationship between variables such that when plotted on a coordinate plane, the points lie on a line. Let’s start by looking at a series of points in Quadrant I on the coordinate plane. Look at the five ordered pairs (and their x– and y-coordinates) below.

Answer:

Graphing ordered pairs is only the beginning of the story. Once you know how to place points on a grid, you can use them to make sense of all kinds of mathematical relationships. A linear relationship is a relationship between variables such that when plotted on a coordinate plane, the points lie on a line. Let’s start by looking at a series of points in Quadrant I on the coordinate plane. Look at the five ordered pairs (and their x– and y-coordinates) below.

Brainliest?!?!??!?

I need one more .

f(x) = x2 + 1
f(-3)=)

Answers

Answer:

f(-3) means, put -3 at x

therefore, f(-3)= 3²+1

=10

Madison has test scores of 93, 82, 86, and 75. What is the mean?
answer as fast a possible

Answers

Answer:

Mean is 84

Step-by-step explanation:

Which equation represents a linear function. Pic attached and I will mark brainly

Answers

Answer:

I will answer the equation, however there is no pic attached

Step-by-step explanation:

Olivia takes a brisk walk around a pond. She walks 1.25 hours at an average speed of 3 miles per hour. What is the distance around the pond? The distance around the pond is _____________________.

**Please label your answer.**

Answers

Answer:

3.75 miles i think

Step-by-step explanation:

Help help help help help pls

Answers

The answer is c maybe but I might be wrong and I might be correct but who knows unless you pick C

Find the given probabilities. If the probabilities or given in decimal then your answer should be in decimals. If the probabilities are a fraction then your answer should be in fraction.

a. If \large P\left(A\right)=\frac{1}{6} and \large P\left(B\right)=\frac{4}{9}, and events A and B are disjoint events, so \large P\left(A or B\right)=

b. If P(A)= .67 and P(B)= .13 and events A and B are disjoint events, so P(A or B)=

Answers

Answer:

B

Step-by-step explanation:

5. Carlos and Mike are selling cheesecakes for a school fundraiser. Customers can buy pecan
cheesecakes and apple cheesecakes. Carlos sold 1 pecan cheesecake and 4 apple cheesecakes for a total
of $44. Mike sold 14 pecan cheesecakes and 14 apple cheesecakes for a total of $238. Find the cost
each of one pecan cheesecake and one apple cheesecake.
a. Define variables:
b. System:
c. Solve the systems (optional):

Answers

Answer:

One pecan costs $8. One apple costs $9.

Step-by-step explanation:

p and a are number of number of pecan and apple sold, respectively.

:::::

"1 pecan cheesecake and 4 apple cheesecakes for $44"

p + 4a = 44

"14 pecan cheesecakes and 14 apple cheesecakes for $238"

14p + 14a = 238

You have a system of two equations in two unknowns:

p + 4a = 44

14p + 14a = 238

:::::

Eliminate the p terms: Multiply the first equation by -14, then add the product to the second equation.

-14p  - 56a = -616

 14p + 14a = 238

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

  -42a = -378

a = (-378)/(-42) = 9

p = 44-4a = 8

One pecan costs $8. One apple costs $9.

The length of a rectangle is three times its width, if the area of the rectangle is 108cm2, find its perimeter

Answers

Answer:

The perimeter of rectangle is 48 cm.

Step-by-step explanation:

First, you have to form an expression for the length and the width. Let x be the width :

width = x cm

length = 3 × x = 3x cm

Then, you have to apply area of rectangle formula, A = length × width to find the value of x.Let area equals to 108 :

A = length × width

108 = 3x × x

3x² = 108

x² = 108 ÷ 3

x² = 36

x = √36

x = 6 cm

Lastly, you have to find perimeter :

length = 3 × 6 = 18 cm

width = 6 cm

Perimeter = 2(length + width)

P = 2(18 + 6)

P = 2(24)

P = 48 cm

Answer:

48cm

Step-by-step explanation:

find product of 5/12×6​

Answers

multiply the numerators to get 30 then denominators to get 12
so the answer is 30/12

which is 5/2

Answer:

2 and 1/2

Result in decimals: 2.5

Step-by-step explanation:

5/12 × 6/1 = 5/2 = 2 and 1/2

Result in decimals: 2.5

Calculation steps:

5/12 × 6/1 = (5 × 6)/(12 × 1) = 30/12

30 ÷ 6 = 5

12 ÷ 6 = 2

= 5/2

= 2 and 1/2

Is this relation a function (1,3)
(1, 20)
(9, 4)

Answers

Since x=1 produces y=3 and y=20, the relation (1,3),(1,20),(9,4) is not a function.

The relation is not a function.

If a ball is thrown straight up into the air with an initial velocity of 100 ft/s, it height in feet after t second is given by y = 100t – 16.

a.) Find the average velocity for the time period begining when t = 2 and lasting for the given amount of time.

0.5 seconds


(ii) 0.1 seconds.


(iii) 0.01 seconds.


b.) Based on the above results, guess what the instantaneous velocity of the ball is when t = 2 seconds.
Answer:

Answers

Answer:

11 0.1 seconds

Step-by-step explanation:

Which is a better estimate for the weight of a double-decker bus

Answers

Step-by-step explanation:

Coaches are typically sized to a height of 4.38 meters, whereas 'high-bridge' vehicles are usually around 20 centimeters higher. At an average height of 18.65 metres, integrated double-deckers are often permitted .

A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.

Which one is it??

Answers

Black F 19. I HOOKUP ! $100 & less. Deposit required . I CAN VERIFY

Solve for x and y
A=3y
B=105
C=9x+5
D=2x+10



Answers

Where’s the equation?

Answer:

Where's the equation?

The triangles are similar. Complete the similarity statement

Answers

Answer:

ABC

Step-by-step explanation:

Answer:

YZX ~ ABC

Step-by-step explanation:

For Angle Y, there is one curved line, so you must go to the other triangle and find which angle has one curved line too, in this case that is angle A. Then, Angle Z has three curved lines, and in the other triangle, Angle B has three curved lines, so you now have AB, which only leaves C left. So your final answer is ABC.

Solve the following equations for the given variable.
3x + 2y = 6 for y
Answer:

Answers

Answer:

y=3

Step-by-step explanation:

you just need to do 2 divided by 6

Answer:   y = -3/2x + 3

Step-by-step explanation:

3x + 2y = 6        First Isolate y by subtracting 3x from both sides  

-3x          -3x

   2y = -3x + 6       Now divide both sides by 2

  y = -3/2x + 3

A box of cereal contains 16 cups. If each bowl holds 1 1/3 cups of cereal, how many bowls of cereal will you get out of the box?

Answers

Answer:

the answer is 12

Step-by-step explanation:

3. Maryia wants to save money on a new computer. At the store near her,
the computer she wants is listed at a regular price of $400.00. On
Saturday, the store will have a sale and discount the computer by 1/5 off
the original price. How much will Maryia pay, when she buys the computer
that Saturday? *
A. $320
B. $210
O C. $250
O D. $120

Answers

Answer:

A

Step-by-step explanation:

So, what is happening is that the sale would put the computer on 4/5 the original price, since 1/5 of the price is being taken away in the sale.

4 divided by 5 is 0.8, and 0.8 times 400 is 320.

Hope this helps!

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