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
expeople1 [14]
3 years ago
8

What is the value of x in the equation x – y = 30, when y = 15?

Mathematics
2 answers:
vovikov84 [41]3 years ago
6 0
X should be 45
45-15=30
fomenos3 years ago
6 0
So you can plug in 15 and now the equation is x - 15 = 30. so then add 15 to 30 and so x is 45. you can plug in the numbers to see if it is correct. 45 - 15 does equal 30 so it is true. x = 45

You might be interested in
Mediam of 50+45+49+50+43+49+45+49+45+47+44+51+51+44+47+46+50+44+51+49+43+43+49+45+46+45+51+46
Doss [256]

Answer:

The median is equal 46.5

Step-by-step explanation:

to find the median, we will need to rearrange the numbers in ascending order, so we will have

43, 43, 43, 44, 44, 44, 45, 45, 45, 45, 45, 46, 46, 46, 47, 47, 49, 49, 49, 49, 49, 50, 50, 50, 51, 51, 51, 51

Note that there are 28 numbers in total, therefore the median will fall in between the fourteenth and the fifteenth number which are 46 and 47 respectively.

Since we are considering two figures as median, we will need to find the average, which will be

(46 + 47)/2 = 46.5

The median is therefore 46.5

8 0
3 years ago
Which equation can be used to represent the statement?
Arte-miy333 [17]

You need to specify the statement needed to use the equation. Thank you. I will then answer it if needed.

3 0
3 years ago
What is the exact volume of the cone?
AlekseyPX
The volume is 508.94 cm^3

7 0
3 years ago
Read 2 more answers
What's a simplified form of x-1+4+7x-3
Dovator [93]
Ok so right now leave the x's alone. Now add/subtract the numbers without variables which would equal to 0 since -1+4 = 3 and 3-3 =0

now 7x+x =8x so 8x is answer
8 0
3 years ago
The probability that a grader will make a marking error on any particular question of a multiple-choice exam is 0.15. If there a
sashaice [31]

Answer:

P(X=0)=(10C10)(0.15)^{0} (1-0.15)^{10-0}=0.1969

P(X \geq 1)= 1-P(X

P(X=0)=(nCn)(p)^{0} (1-p)^{n-0}=(1-p)^n

P(X \geq 1)= 1-P(X

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: P(A)+P(A') =1

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=10, p=0.15)

what is the probability that no errors are made?

For this case means that all the questions were correct so we want this probability:

P(X=0)=(10C10)(0.15)^{0} (1-0.15)^{10-0}=0.1969

what is the probability that at least one error made?

For this case we want this probability:

P(X \geq 1)

And we can use the complement rule:

P(X \geq 1)= 1-P(X

If there are n questions and the probability of a marking error is p rather than 0.15, give expressions for the probabilities of no errors  and at least one error

P(X=0)=(nCn)(p)^{0} (1-p)^{n-0}=(1-p)^n

P(X \geq 1)= 1-P(X

8 0
3 years ago
Other questions:
  • Combining like terms.
    8·1 answer
  • Write the multiples of 6 starting from 24
    15·1 answer
  • How to find the area of a segment of a circle if r=8 and central angle =120 degrees. Please explain clearly and thoroughly. Will
    5·1 answer
  • Find x in the following equation 2x^{2} +4=0
    13·1 answer
  • 15(1-3)<br> 5<br> 3(2x - 3)<br> Solve the equation by using the distributive property first.
    10·1 answer
  • In your own words explain how to find simple interest. NEED HELP ASAP WILL GIVE 35 POINTS
    7·1 answer
  • Which of the following equations has a solution x = 4? Select all that apply.
    5·2 answers
  • Brad bought a piece of industrial real estate for $192,345. The value of the real estate appreciated at a constant rate per year
    10·1 answer
  • HELP HELP HELP
    12·1 answer
  • There are 20 squares and 4 circles. What is the simplest ratio of circles to squares?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!