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
quester [9]
3 years ago
12

Write and solve the system using any method:

Mathematics
1 answer:
Leona [35]3 years ago
7 0

Answer:

1. x + y = 25

2. x - y = 7

3. x = 16, y = 9

Step-by-step explanation:

(x + y = 25) + (x - y = 7)

2x (the y cancels) = 32

32/2 = 16, x = 16

substitute x in either equation

16 + y = 25

y = 9

You might be interested in
If 40 percent of the eggs were cracked what fraction of the eggs were cracked
Katyanochek1 [597]

Answer:

2/5

explanation:

4 0
3 years ago
Read 2 more answers
Whats A Tangent Line ?
lawyer [7]
A tangent is a line that touches a circle only at one point

5 0
3 years ago
Emma wants to buy a new tablet that costs $329. At checkout, her total was $356.97.
nikitadnepr [17]

? what are you asking

4 0
3 years ago
Read 2 more answers
Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X = the number of free throws Faith makes
nasty-shy [4]

Using the binomial distribution, it is found that:

  • The mean of X is of 19.
  • The standard deviation of X is of 0.975.
  • P(X = 19) = 0.3774.
  • There is a 0.9246 = 92.46% probability that practice ends early.

<h3>Binomial probability distribution</h3>

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

The mean of X is:

E(X) = np

The standard deviation of X is:

\sqrt{V(X)} = \sqrt{np(1 - p)}

In this problem:

  • Faith is a 95% free throw shooter, hence p = 0.95.
  • Each player shoots 20 free throws, hence n = 20.

The <em>mean </em>and the <em>standard deviation</em> are:

E(X) = np = 20(0.95) = 19

\sqrt{V(X)} = \sqrt{20(0.95)(0.05)} = 0.975

P(X = 19) is given by:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 19) = C_{20,19}.(0.95)^{19}.(0.05)^{1} = 0.3774

The probability that <u>practice ends early</u> is:

P(X \geq 18) = P(X = 18) + P(X = 19) + P(X = 20)

In which:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 18) = C_{20,18}.(0.95)^{18}.(0.05)^{2} = 0.1887

P(X = 19) = C_{20,19}.(0.95)^{19}.(0.05)^{1} = 0.3774

P(X = 20) = C_{20,20}.(0.95)^{20}.(0.05)^{0} = 0.3585

Then:

P(X \geq 18) = P(X = 18) + P(X = 19) + P(X = 20) = 0.1887 + 0.3774 + 0.3585 = 0.9246

There is a 0.9246 = 92.46% probability that practice ends early.

You can learn more about the binomial distribution at brainly.com/question/24863377

4 0
3 years ago
Which graph represents the solution to the inequality?
den301095 [7]

Answer:

56

Step-by-step explanation:

I am just trying my best to help

4 0
3 years ago
Other questions:
  • Someone help me out with this question thank you
    8·2 answers
  • 6a+5a=-11<br><br>-2 = -(n - 8)
    5·1 answer
  • Find the intervals of convergence of f(x), f '(x), f ''(x), and ∫f(x) dx. (Be sure to include a check for convergence at the end
    11·1 answer
  • Out of 22 players in a team, 10 of them have an average height of 1.50m while another 10 have an average height of 1.48m. The re
    14·2 answers
  • How many different triangles, if any, can be drawn with one 90° angle and side length of 5 cm and 12 cm?
    5·2 answers
  • Combine the like terms to create an equivalent expression:<br> - k + 3k
    8·1 answer
  • If f (n)= - 3n + 2, what is the value of f(12) ?
    11·2 answers
  • I would really appreciate it if someone could help and answer this with an explanation:)
    11·1 answer
  • Help me out pleaseeeeeeeeeee
    13·1 answer
  • Identify the slope from the table <br><br> NEED HELP PLEASE thank you sb
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!