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
DIA [1.3K]
3 years ago
6

PLEASE HELP ASAP. I HAVE A VERY IMPORTANT TEST AND I NEED HELP

Mathematics
1 answer:
Katarina [22]3 years ago
8 0

Answer:

i think 4 is b

Step-by-step explanation:

You might be interested in
Find the domain<br><br><img src="https://tex.z-dn.net/?f=y%20%3D%20%20%5Csqrt%7B3x%20%2B%205%7D%20" id="TexFormula1" title="y =
sveticcg [70]
y=\sqrt{3x+5}\\\\The\ domain:\\\\3x+5\geq0\ \ \ |-5\\\\3x\geq-5\ \ \ |:3\\\\x\geq-\dfrac{5}{3}\to x\in\left[-\dfrac{5}{3};\ \infty\right)
6 0
3 years ago
Read 2 more answers
A true/false test consists of 25 questions. A student knows the correct answer to 10 of the questions. She guesses each of the o
babunello [35]

Answer:

The expectation of the number of correct answers is 17.5

Step-by-step explanation:

For each question, there are only two possible outcomes. Either the student guesses it correctly, or he does not. The probability of a student guessing the answer of a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

E(X) = np

In this problem, we have that:

25 questions.

The student know the answer for 10 questions. So for these 10 questions, p = 1.

On the other 25-10 = 15, she will guess, which there is one correct answer out of 2 options(true/false), so p = 1/2 = 0.5. So

E(X) = 10*1 + 15*0.5 = 17.5

The expectation of the number of correct answers is 17.5

4 0
3 years ago
A person is standing 17 feet away from a tree and there is a bird's nest in the tree 10 feet above the ground. What is the angle
sergij07 [2.7K]

Answer:

The angle of elevation from the person is ~ 19.7 feet

Step-by-step explanation:

Call the distance from the person to the tree is A and the bird's nest to the ground is B (right angle side of right triangle)

The distance from the person to the bird's nest is the hypotenuse (call C) of the right triangle

To find the hypotenuse we take the square root of the sum of the squares of the two sides of the right angle.

<u><em>Pythagorean formula</em></u>

<u><em></em></u>A^2 + B^2 = C^2<u><em></em></u>

<u><em></em></u>

5 0
3 years ago
(X-10, y+6)
Mama L [17]

Answer:

-3

Step-by-step explanation:

step one

step two

step 3

step bro

step person

step afganstan country

step on a bird

step

5 0
3 years ago
What is the greatest common factor of 35 and 63
Vitek1552 [10]
The GCF (greatest common factor) of 35 and 63 is 7.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Review the proof of the identity cos(π − A) = −cosA.
    5·2 answers
  • Traveling at 55 miles per hour, how many minutes, rounded to the nearest whole number, does it take to drive 310 miles
    7·1 answer
  • A triangle is classified as an equilateral triangle when it has
    5·2 answers
  • If 80% of a number is 240. find the number explain the steps
    8·1 answer
  • Solve 2t+3y=x-5 solve for t
    9·1 answer
  • Si tengo 10 vacas y solo tengo 9 corrales entonces ¿Cómo colocar las 10 vacas dentro de los 9 corrales?
    8·1 answer
  • Which graph represents the solution to the inequality 3x – 5 &gt; -11 ? <br>​
    7·2 answers
  • Tim (the tallest) is older than Michael (the lightest). Jason (the oldest) is shorter than Nick (the heaviest). No one has the s
    14·1 answer
  • An elliptical mirror measures 20 inches wide and 24 inches high. The ellipse is centered at (0, 60) on a coordinate plane, where
    8·1 answer
  • A bulldozer does 4,500 j of work to push a mound of soil to the top of a ramp that is 15 m high. the ramp is at an angle of 35°
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!