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
Vladimir [108]
3 years ago
12

1)A bag contains seven red marbles and seven

Mathematics
1 answer:
Illusion [34]3 years ago
3 0

Answer: 7/26

Step-by-step explanation:

7 red and 7 blue = 14 total

7/14 or 1/2 chance of getting red first

7/13 chance of getting red the second time

7/13*1/2 = 7/26

7/26 chance

sorry if it’s wrong but I hope it helps

You might be interested in
Urgent help! 40 points!
AURORKA [14]
Short Answer: 150

Remark
You have to use two facts.
1. The central angle = 2 * the angle at B
2. The central angle = the arc angle.

Given
angle at B = 75 degrees.

Calculate the central angle
Central angle = 2 * angle at B
Central angle = 2 * 75
Central angle = 150

Conclusion
The arc angle = Central angle
The arc angle = 150 degrees.
4 0
2 years ago
Read 2 more answers
Scientists are monitoring the pH of oceans. Which of these are they most likely studying?
Natali5045456 [20]

Answer:

A

Step-by-step explanation:

4 0
2 years ago
Arthur is building a rectangular sandbox for his son. The area of the sandbox is 17 23/32 square feet. If the length of the sand
Elina [12.6K]
Author is building a regular sandbox for his son, the area of the sandbox is 17 23/32 square ft. If the length of if the length of the sandbox is 3 3/8 ft
5 0
3 years ago
Read 2 more answers
Justin get to the basketball game at 7:35 pm and it last for 3 hours and 27 minutes. what is the time now​
Nat2105 [25]

11:02

i don't know if im correct, sorry.

7 0
2 years ago
Find the exact value of sin(cos^-1(4/5))
boyakko [2]
If you're using the app, try seeing this answer through your browser:  brainly.com/question/2762144

_______________


Let  \mathsf{\theta=cos^{-1}\!\left(\dfrac{4}{5}\right).}


\mathsf{0\le \theta\le\pi,}  because that is the range of the inverse cosine funcition.


Also,

\mathsf{cos\,\theta=cos\!\left[cos^{-1}\!\left(\dfrac{4}{5}\right)\right]}\\\\\\
\mathsf{cos\,\theta=\dfrac{4}{5}}\\\\\\ \mathsf{5\,cos\,\theta=4}


Square both sides and apply the fundamental trigonometric identity:

\mathsf{(5\,cos\,\theta)^2=4^2}\\\\
\mathsf{5^2\,cos^2\,\theta=4^2}\\\\
\mathsf{25\,cos^2\,\theta=16\qquad\qquad(but,~cos^2\,\theta=1-sin^2\,\theta)}\\\\
\mathsf{25\cdot (1-sin^2\,\theta)=16}

\mathsf{25-25\,sin^2\,\theta=16}\\\\
\mathsf{25-16=25\,sin^2\,\theta}\\\\
\mathsf{9=25\,sin^2\,\theta}\\\\
\mathsf{sin^2\,\theta=\dfrac{9}{25}}


\mathsf{sin\,\theta=\pm\,\sqrt{\dfrac{9}{25}}}\\\\\\
\mathsf{sin\,\theta=\pm\,\sqrt{\dfrac{3^2}{5^2}}}\\\\\\
\mathsf{sin\,\theta=\pm\,\dfrac{3}{5}}


But \mathsf{0\le \theta\le\pi,} which means \theta lies either in the 1st or the 2nd quadrant. So \mathsf{sin\,\theta} is a positive number:

\mathsf{sin\,\theta=\dfrac{3}{5}}\\\\\\
\therefore~~\mathsf{sin\!\left[cos^{-1}\!\left(\dfrac{4}{5}\right)\right]=\dfrac{3}{5}\qquad\quad\checkmark}


I hope this helps. =)


Tags:  <em>inverse trigonometric function cosine sine cos sin trig trigonometry</em>

3 0
3 years ago
Read 2 more answers
Other questions:
  • Help!!!!!!!!!!!!!!!!!
    14·2 answers
  • Simplify the following exponential expression. Show your work step by step and list the Properties of Exponents used to solve th
    14·1 answer
  • Define an altitude of a triangle.
    12·1 answer
  • The equation of line q is 5y - 4x = 10. Write an equation the line that is perpendicular to g and passes through the
    14·1 answer
  • 3/4 - 1/2n =5/8. solve for n
    11·2 answers
  • Find the volume of a right circular cone that has a height of 17.6 m and a base with a
    13·1 answer
  • An arts academy requires there to be4 teachers for every68 students and3 tutors for every30 students. How many students does the
    14·1 answer
  • Solve.
    14·1 answer
  • Which equation is the steepest slope?<br> • y=4x<br> • y=-10x<br> • y=-7x<br> • y=3x
    13·1 answer
  • Angelina's family owns a mini-golf course. When discussing the business with a customer, she explains there is a relationship be
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!