1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andru [333]
3 years ago
10

A bag contains only red and blue marbles. Yasmine takes one marble at random from the bag. The probability that she takes a red

marble is 1 in 5. Yasmine returns the marble to the bag and adds five more red marbles to the bag. The probability that she takes one red marble at random is now 1 in 3. How many red marbles were originally in the bag?
Mathematics
2 answers:
strojnjashka [21]3 years ago
8 0
Since the first probability is 1/5, the number of read marbles was either 1 (if there were 5 marbles total), 2 (if there were 10 total), 3 (15 total), 4 (20 total), 5 (25 total), etc.. When you add 5 red marbles to the bag, you are increasing each of those fractions by 5/5. Therefore 1/5 would turn into 6/10 or 3/5. That's not our last probability so we keep going. 2/10 would turn into 7/15. Nope. 3/15 turns into 8/20 or 2/5. Nope. 4/20 turns into 9/25. Nope. 5/25 turns into 10/30 or 1/3. Therefore, the bag started with 5 red marbles out of a total of 25 marbles.
NNADVOKAT [17]3 years ago
4 0
10 10 is the answer i believe
You might be interested in
What is the minimum number of 60 passenger buses needed to transport 200 students?
astraxan [27]
The answer is 4. 3 busses would carry 180, so you gotta have that one extra bus. The question is set up to kind of throw you off but it's quite simple
6 0
3 years ago
Find the measures of angles S and T in the triangle below.
tigry1 [53]
Answer:

60 degrees

Step-by-step explanation:

The type of triangle we’re looking at is a equilateral triangle meaning all sides and all angle measures measure the exact same thing.

With all this information, angle S and T measure 60*
•••••••••••••••••••••••••••••••
doomdabomb: All brainliest
and thanks are appreciated
and would mean a lot to me,
Thanks!
5 0
3 years ago
How do I find the vertex and the standard form? Plz explain
xenn [34]

Answer:

Vertex form

y = -4(x + 3)^2 + 10

Standard form;

y = -4x^2-24x - 26

Step-by-step explanation:

Mathematically, we have the vertex form as

y = a(x-h)^2 + k

(h,k) represents the vertex

We have h as -3 and k as 10

y = a(x+3)^2 + 10

To get a, we substitute any of the points

Let us use (-1,-6)

-6 = a(-1+3)^2 + 10

-6-10 = 4a

4a = -16

a = -16/4

a = -4

So we have the equation as;

y = -4(x+3)^2 + 10

For the standard form;

We expand the vertex form;

y = -4(x + 3)(x + 3) + 10

y = -4(x^2 + 6x + 9) + 10

y = -4x^2 - 24x -36 + 10

y = -4x^2 -24x -26

7 0
3 years ago
A. Statistics is the science of​ manipulating, reorganizing, and editing information to produce the desired results. In​ add
Jlenok [28]

Answer:

The correct definition of statistics is

B. Statistics is the science of collecting, organizing, summarizing, and analyzing information to draw a conclusion and answer questions. In addition, statistics is about providing a measure of confidence in any conclusions.

Explanation:

Statistics is the science of collecting, organizing, summarizing, and analyzing the information and based on this information a conclusion is drawn about the collected information. There are two main divisions of statistics:

1. Descriptive statistics: It deals with providing the summary about the information collected.

2. Inferential statistics: This division deals with using a sample from the population and drawing the conclusion about the population using the sample. It also includes providing a measure of confidence in any conclusions.


8 0
4 years ago
Sheila has 5 times as many markers as dave. together they have 18 markers. How many markers does sheila have
Karolina [17]

Answer:

15

Step-by-step explanation:

Let, x, represent the value of Dave's markers. You then make the equation (5x+x=18) because both markers combined is 18 and Sheila has 5 times the markers of Dave so her value would represent 5x. Solving the equation would get you x=3 BUT THAT IS THE VALUE OF DAVE'S MARKERS! The question asks for Sheila's with is 5*3. So the answer is 15 markers.

3 0
3 years ago
Other questions:
  • Micah is deciding what rooms of his house he is going to paint. He wants to spend no more than $150 on the paint and supplies.
    14·1 answer
  • Vanessa earns a base salary of $400 every week with an additional 5% commission on everything she sells. Vanessa sold $1850 wort
    6·1 answer
  • There are 20 students in the community service club. The club needs 4 officers: a president, a vice president, a secretary, and
    5·2 answers
  • One side of a triangular garden is x feet long. The other two sides of the garden are both 5 feet less than twice the length of
    5·1 answer
  • Bonnie said that the product of 5/6 times 1 and 2/3 is 7/3. how can you tell her answer is wrong ?
    13·2 answers
  • The longest side of an acute isosceles triangle is 8 centimeters. Rounded to the nearest tenth , what is the smallest possible l
    10·1 answer
  • I need to know these two answers
    11·1 answer
  • Which is the value in this equation 4x+5=3x+4
    11·1 answer
  • Please find the result !​
    10·2 answers
  • 2. Write an expression that can be used to
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!