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
Likurg_2 [28]
3 years ago
13

SOMEONE PLZZZ HELP ME OUT FASTTTTT!!!

Mathematics
1 answer:
ch4aika [34]3 years ago
8 0
1. The probability would be 5/100, simplified would be 1/20.

2. The probability would be 1600/10,000, simplified would be 16/100.

3. A vowel would be 6/13 and a constant would be 7/13.

4. The experimental probability of getting heads would be 12/20, simplified 3/5. This may differ from the theoretical probability because you are only flipping it 20 times.

I hope this helped! Brainliest? :) -Raven❤️
You might be interested in
Tanya wants to find the height of the tree. She walks away from the base of the tree so the tip of her shadow coincides with the
Vikki [24]
<span><u>Answer </u>
18 feet and 4.5 inches

<u>Explanation </u>
You are going to use the concept of similar triangle.
∆CED≡∆CBA
This is because they share the angle at C and also they both have an angle of 90o.
Let EC = X, then BE = 2.5X. So, BE = (X + 2.5X) = 3.5X
The scale factor EC/BC=x/3.5x=2/7
EC/BC=ED/BA=2/7
BA=7/2×63 in
The height of the tree = 220.5 inches. This is equal 18 feet and 4.5 inches.  
</span>
3 0
3 years ago
A test is used to assess readiness for college. In a recent​ year, the mean test score was 20.3 and the standard deviation was 4
Vlada [557]

Answer:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low\leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

For this case we can consider a value to be significantly low if we have that the z  score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is  higher tor equal to 2.

For this case we have the mean and the deviation given:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low \leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

6 0
3 years ago
when you reverse the digits in a certain two-diget number you increase it value by 27. What is the number if the sum of its digi
Fynjy0 [20]
The number is = 10x+y
if reverse the digits, the number is: 10y+x
The sum fo its digits is =  x+y=5
I suggest this system of equations:
(10y+x)-(10x+y)=27    ⇒9y-9x=27
x+y=5
We can solve this system of equations by equaliztion method
x=5-y

9y-9(5-y)=27
9y-45+9y=27
18y=27+45
18y=72
y=72/18
y=4

x=5-y
x=5-4=1

The number is: 10x+y=10(1)+4=14

Answer: the number is 14
3 0
3 years ago
Read 2 more answers
if grace and claire parents each invested 7,600 into college saving account when the girls were born how much money will each gi
Mrrafil [7]

Answer:

7,600

Step-by-step explanation:

both parents invest 7,600.

7,600x2= 15,200

there are 2 girls so divide 15,200 by 2 and u get 7,600

3 0
2 years ago
Please help me it is very much appreciated
pshichka [43]
<h2>C</h2>

Hope it helps you!

-miraculousfanx-

7 0
3 years ago
Other questions:
  • What is 16-2t=5t+9
    10·2 answers
  • How many faces does a cone, cube, square pyramid , and triangular pyramid have
    5·2 answers
  • What is a correct name for the angle shown bellow​
    7·1 answer
  • Which description is correct for the polynomial 4x² +3x +5?
    5·2 answers
  • I REALLY NEED HELP!!!!!!!
    15·1 answer
  • The total amount of money, M, that Bob earns each week at his job is proportional to the wages, w, that he earns per hour for wo
    11·2 answers
  • A city with an area of 87 square miles has a population denstiy of 3,517 residents per square mile. What is the citys population
    9·1 answer
  • I need help with 10 to the 3 power
    15·2 answers
  • Twice a number minus 25 is less than 89. Translate it into an inequality and find the solution
    8·1 answer
  • HELP ME PLS I NEED THE ANSWER ASAP
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!