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
Llana [10]
3 years ago
9

The triangles are similar. What is the value of x? Enter your answer in the box. X=

Mathematics
2 answers:
Elina [12.6K]3 years ago
8 0
Honestly I don’t even know what this is sorry I tried
Volgvan3 years ago
3 0
X=21

If the triangle are similar then you can divide.
75 divided by 25 is 3
72 divided by 21 is 3
so that means if you take 7 times 3 you will get 21
You might be interested in
. In a study of air-bag effectiveness it was found that in 821 crashes of midsize cars equipped with air bags, 46 of the crashes
jok3333 [9.3K]

Answer:

P(X ≤ 46 | X~B(821, 0.078)) = 0.00885745584

0.00885... < 0.01

The test statistic of 46 is significant

There is sufficient evidence to reject H₀ and accept H₁

Air bags are more effective as protection than safety belts

Step-by-step explanation:

821 crashes

46 hospitalisations where car has air bags

7.8% or 0.078 probability of hospitalisations in cars with automatic safety belts

α = 0.01 or 1% ← level of significance

One-tailed test

We are testing whether hospitalisations in cars with air bags are less likely than in a car with automatic safety belts;

The likelihood of hospitalisation in a car with automatic safety belts, we are told, is 7.8% or 0.078;

So we are testing if hospitalisations in cars with air bags is less than 0.078;

So, firstly:

Let X be the continuous random variable, the number of hospitalisations from a car crash with equipped air bags

X~B(821, 0.078)

Null hypothesis (H₀): p = 0.078

Alternative hypothesis (H₁): p < 0.078

According to the information, we reject H₀ if:

P(X ≤ 46 | X~B(821, 0.078)) < 0.01

To find P(X ≤ 46) or equally P(X < 47), it could be quite long-winded to do manually for this particular scenario;

If you are interested, the manual process involves using the formula for every value of x up to and including 46, i.e. x = 0, x = 1, x = 2, etc. until x = 46, the formula is:

P(X = r) = nCr * p^{r}  * (1 - p)^{n - r}

You can find binomial distribution calculators online, where you input n (i.e. the number of trials or 821 in this case), probability (i.e. 0.078) and the test statistic (i.e. 46), it does it all for you, which gives:

P(X ≤ 46 | X~B(821, 0.078)) = 0.00885745584

Now, we need to consider if the condition for rejecting H₀ is met and recognise that:

0.00885... < 0.01

There is sufficient evidence to reject H₀ and accept H₁.

To explain what this means:

The test statistic of 46 is significant according to the 1% significance level, meaning the likelihood that only 46 hospitalisations are seen in car crashes with air bags in the car as compared to the expected number in car crashes with automatic safety belts is very unlikely, less than 1%, to be simply down to chance;

In other words, there is 99%+ probability that the lower number of hospitalisations in car crashes with air bags is due to some reason, such as air bags being more effective as a protective implement than the safety belts in car crashes.

5 0
3 years ago
Plz help us out we really need this
padilas [110]

Answer:

Um sry but what type of teacher tells there kid to do work on break doing freaking imagine math like Boy!lol

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Help me pleasee I really<br> Need help
DanielleElmas [232]
We can’t measure these. How long is each of them
6 0
3 years ago
A pet store sells mice reptiles and birds
Vera_Pavlovna [14]

Answer:

P(A or B) represents the probability that a customer will buy either a mouse or a reptile at the pet store.  So, there is a 20%, or 1 out 5 chance that a customer will buy either one when they come in to purchase a pet.

Step-by-step explanation:

Probability represents the fraction of the desired number of outcomes over the total number of outcomes.  In the case of the pet store, their total outcomes can be the purchase of a mouse, reptile or bird.  We don't know how much of each animal they have, however, they tell us that the probability that a customer will buy either a mouse OR a reptile is 0.20.  This means that the probability of buying a mouse and the probability of buying a reptile are added together to equal 0.20 or 20% which is also 1/5.  

7 0
3 years ago
Read 2 more answers
What is 57,909,000 in scientific notation?
LenaWriter [7]
Hello,

Shall we begin?

<span>57,909,000
</span>
= 5.7909 * 10 ^7


Answers: 5.7909 * 10 ^7
5 0
3 years ago
Other questions:
  • A manufacturer makes two types of handmade fancy paper bags. Type A and Type B. Two designers a cutter and a finisher need to wo
    10·1 answer
  • (40pts) Mr. Green had 200 dollars and Mrs.Green had 180 dollars. After they each bought the same t-shirt, the ratio of the numbe
    14·2 answers
  • Frank and Linda just finished a meal and received their bill for $47.60. They would like to leave their server a 20 percent tip.
    7·1 answer
  • Find a pair of numbers that is a member of both x=1+1y and x=36-4y
    7·1 answer
  • A piggy bank contains 35 coins.
    9·1 answer
  • Find x in the kite below
    13·2 answers
  • The sum of the digits of a two-digit number is 10. When the digits are reversed, the number decreases by 36. Find the original n
    6·1 answer
  • Ann bought 24 bags of salad for a party. Three bags of salad serve 5 people. At that rate, how many people will 24 bags of salad
    12·1 answer
  • Max has 5 apples he gives away 2 How many apples does he have left
    13·1 answer
  • Whats the answer because im doing soemthing on like i need help with it
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!