Mathematics High School

An urn contains three red marbles and four blue marbles. One marble is selected at random, its color is noted, and it is returned to the urn.
Another marble is then selected. What is the probability that the second marble drawn is red?
A.1/2
b:1/7
c:2/7
d:3/7

Answers

Answer 1

Answer:

i hope my answer help You

Step-by-step explanation:

the answe is d:3/7

Related Questions

if y=3 then 14y equals

Answers

Answer:

42

Step-by-step explanation:

14(3)

Answer:

42

Step-by-step explanation:

first, substitute 3 for y in 14y. 14y means you are multiplying 14 and y, so when you plug in 3 for y, you're multiplying 14 and 3! :)

14y ⇒ 14(3)

simplify by multiplying 14 · 3.

14(3) = 42

so, when y = 3, 14y = 42.

you can check the answer by solving for y in 14y = 42.

divide both sides of the equation by 14.

14y/14 = 1y or y42/14 = 3

after dividing, you're left with y = 3. that means 14y does indeed equal 42 when y = 3! :)

i hope this helps! have a great rest of your day <3

Which pair of lines are perpendicular lines?

Answers

Answer:

A

Step-by-step explanation:

perpendicular lines have the same slope

does 9/20 and 18/30 form a proportion

Answers

Answer:

No, they don't.

Step-by-step explanation:

I'm going to divide 18 by 9 and 30 by 20. If the quotients are the same, then we do have a proportion.

18 ÷ 9 = 2

30 ÷ 20 = 1.5

The quotients aren't the same. Same thing if you convert the fractions to decimals:

9 ÷ 20 = 0.45

18 ÷ 30 = 0.6

This means the two values do NOT form a proportion.

Hope this helps! Have a great day!

Answer:

No.

Step-by-step explanation:

9/20=18/30

9*30=20*18

120=360

If you would like to know how this works please do not hesitate to ask.

Factoring.

The answer is supposed to look like this.

EXAMPLE:

5x(6x+2)(6x-2)

Answers

Answer:

3(5x+3)(5x-3)

Step-by-step explanation:

75x^2-27=3(25x^2-9)=3(5x+3)(5x-3)

Evaluate x + 23
when x=7

Answers

Answer:

30

Step-by-step explanation:

x + 23 = ?

x = 7

All we need to do is plug in x =7 to the first equation:

7 + 23 = ?

We simplify and get:

30 = ?

Is this a function?

Answers

i think it is!

there are no points that are in the same x unit!

hope this help! :(

Graph - 2x + 4y = 16 using
intercepts.

Answers

Answer:

y intercept is -1/2

Step-by-step explanation:

Step-by-step explanation:

here you go love use an app it tells you everything

What is the value of 3-(-2)?​

Answers

Answer:

5

Step-by-step explanation:

The answer is 5
You add when the equation is set up like that
for example : 4-(-3)=7

A circular running track is 1/2 mile long. Elena runs on this track completing each lap in 6 minutes how long will it take Elena to run 3 miles?

Answers

Answer:

36 mins

Step-by-step explanation:

0.5 miles/6 mins = 3 miles/x mins

In order to convert the ratio from 0.5 miles to 3 miles, 0.5 was multiplied by 6. Therefore, to keep the ratio the same, 6 minutes must also be multiplied by 6 to find x. This means the answer is:

3 miles/36 mins

HELP
A rectangular garden has dimensions of 100 feet by 10 feet. Next season, the garden is decreased to 25 of its size. What is the scale of the drawing for the new garden shown below?
A rectangle that is 8 inches long and four-fifths of an inch wide.

Answers

Answer:

1inch=5

Step-by-step explanation:

2/5*100/1=200/5

200/5=40

40/8=5

W(-1, 4), X(1, 2), Y-2, 1); k = 3

Answers

Answer:

what is the question

Step-by-step explanation:

get the latest flash player is required for video playback is unavailable right now because this video is not available for remote playback is

-4x - 6x = -20 =?

-3(2x - 3) = 33 = ?

4x + 3x + 2x = 180 = ?

Answers

Answer:

-4x-6x=-20=

x=2

-3(2x-3)=33=

x=-4

4x+3x+2x=180

x=20

Step-by-step explanation:

-4x-6x=-20                                

-4+(-6)=-10x

-10x=20 (divide both by 10)

x=-2 (divide by -1 to get positive)

x=2

-3(2x-3)=33

-6x+9=33

     -9 .  -9

-6x=24 (divide both by -6)

x=-4 (divide by -1 to make positive)

4x+3x+2x=180

(combine like terms)

9x=180 (divide both sides by 9)

x=20

If you answer both questions properly I might give you the brainlies

Answers

Answer:

32

Step-by-step explanation:

Answer 32

Step by step explanation

1. The diameter equals
a. Radius square
b. three times the radius
c. twice the radius
d. half the radius

Answers

Answer:

C) twice the radius

Step-by-step explanation:

the radius is half the diameter

write the equation of the line

Answers

Answer:

y = (3/-2)x + 4.

Step-by-step explanation:

slope intercept form is y = mx + b

1. Lets first look for the y intercept (b). On the graph the line intercepts the y axis at 4. 4 is our b.

2. To find the slope (m) remember rise over run. Counting from lower dot, it goes up 3 and left 2. 3/-2. The two is negative because it is decreasing (towards the left of the graph).

3. Now plug the numbers into slope intercept form. y = (3/-2)x + 4.

I don't remember how to solve this problem I missed yesterday when we learned it. 4(x-2+y)

Answers

Answer:

4x - 8 + 4y

Step-by-step explanation:

4(x - 2 + y)

4x - 8 + 4y

You multiply each term in the parenthesis by the number in front of it.

Michelle has 18.9 yards of string. She cuts the string into 5 pieces of equal length.

How long is each piece?

Answers

Answer:

3.78 (see below)

Step-by-step explanation:

You would have to divide 18.9 by 5, as you're cutting 18.9 into 5 equal parts. Using long division, you can solve this. I have attached an image below for reference:

Answer:

3.78 yd

Step-by-step explanation:

took the test

Please help
In Algebra, equations are math sentences that have an
value.
These unknown values are called
which stand for unknown
numbers that make the equation true.*
known, letters
unknown, variables

Answers

Answer:

I think variables is the answer

Lexington and Louisville, KY are 75 miles apart. If the scale on the map is 1 cm = 5 mi, find the distance on the map between the two cities.

Answers

Answer:

15 cm

Step-by-step explanation:

75 miles / 5 miles = 15

15 * 1 centimeter = 15 cm

Someone help this is due today and its worth half my grade!!

Answers

Answer:

I think it's 2

Step-by-step explanation:

25 divided by 5 = 5

10 divided by 5 = 2

Joe got all three of his sons braces for their teeth altogether he paid $3750 write an equation that could be used to find how much the braces were for each son individually.

Answers

Answer:1,250

Step-by-step explanation:

You have to do 3750 Divided by 3 and you get 1,250

SOMEONE HELPPP! Plss

Answers

Answer:

B. 1/6

Step-by-step explanation:

Help, =10pts
5,8,and9

Answers

Answer:

5. x = 8

8. x = 52

9. a) x/300 = 7/15

9. b) 140

Step-by-step explanation:

5.) x=8
8.) x=52
9a.) x 300 = 7/15
9b.) 140


19. Explain the difference
between (-12)2 and - 122.

Help!

Answers

(-12)2 equals 144 -122 equals 22

-) Select all ordered pairs that satisfy the function y = 5x + 3.
A.
(-3, -37)
B.
(-5, -22)
C.
(-8, -37)
D.
(-5, -12)

Answers

The answers that would work are B and C

I need help with this

Answers

The answer to this is choice D

How do I find x in this problem?

Answers

Answer:

(6-2)×180 = 720

101+154+72+123+145+x=720

595 + x = 720

x = 720-595

x= 125

its about nothing just say oi and u might get 50 points

Answers

Answer:

oi and you might get 50 points

Answer:

Thank you!

Step-by-step explanation:

You are making my day! BTW it is 25 points.

Mike has a 32 ounce drink. He drinks 8 ounces. Select the percent of ounces Mike has left from his drink

Answers

Mike had 32 and now he has 24

Answer:

75%

Step-by-step explanation:

the percentage amount of the drink that mike drank is calculated by dividing the total drink by the amount drank. In this case that is 8/32 which gives us 0.25 or 25%.

In order to find the amount Mike has left you simply subtract the amount drank from the 1 as 1 is equal to 100% or the amount mike had at the begining.   In this case 1-0.15= 0.75 or 75%.

OR

you can also solve this by subtracting tha amount drank by the total then dividing the remaining drink by the total amount of the drink. In this case that would look like:

32-8= 24

24/32= 0.75

please help!!

select all expressions that are equal to 3•3•3•3•3

Answers

B and C are correct

Answer:

B and C

Step-by-step explanation:

3*3*3*3*3 is the same as 3 to the 5th power since there are 5 threes. And then if you put 3 to the 4th power multiplied by 3 into a calculator, you'll get the same answer.

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