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
Tcecarenko [31]
3 years ago
14

A box contains 8 red markers, 5 green markers, and 5 blue markers. Once a marker is pulled from the box, it is replaced, and the

n another marker is pulled. Find the probability of selecting a blue marker and then a red marker.
Mathematics
1 answer:
Andru [333]3 years ago
3 0

Well. add all of these up 8+5+5. we know 5+5 is 10. and 10+8 is 18. so 18 is the denominator.  There are 8 red markers and 5 blue markers at 8 and 5 up. 8+5 is 13 right? So the numerator will be 13.  but the probability of picking a blue then a red is 13 alone or if you are ask for out of the amount of markers there are, its 13/18. so the probability is 13 or 13/18.

You might be interested in
PLS PLS PLS HELP 20 POINTS PLS HELP THX
Flura [38]
The first one- the rest don’t add up
8 0
2 years ago
(1/1+sintheta)=sec^2theta-secthetatantheta pls help me verify this
Xelga [282]

Answer:

See Below.

Step-by-step explanation:

We want to verify the equation:

\displaystyle \frac{1}{1+\sin\theta} = \sec^2\theta - \sec\theta \tan\theta

To start, we can multiply the fraction by (1 - sin(θ)). This yields:

\displaystyle \frac{1}{1+\sin\theta}\left(\frac{1-\sin\theta}{1-\sin\theta}\right) = \sec^2\theta - \sec\theta \tan\theta

Simplify. The denominator uses the difference of two squares pattern:

\displaystyle \frac{1-\sin\theta}{\underbrace{1-\sin^2\theta}_{(a+b)(a-b)=a^2-b^2}} = \sec^2\theta - \sec\theta \tan\theta

Recall that sin²(θ) + cos²(θ) = 1. Hence, cos²(θ) = 1 - sin²(θ). Substitute:

\displaystyle \displaystyle \frac{1-\sin\theta}{\cos^2\theta} = \sec^2\theta - \sec\theta \tan\theta

Split into two separate fractions:

\displaystyle \frac{1}{\cos^2\theta} -\frac{\sin\theta}{\cos^2\theta} = \sec^2\theta - \sec\theta\tan\theta

Rewrite the two fractions:

\displaystyle \left(\frac{1}{\cos\theta}\right)^2-\frac{\sin\theta}{\cos\theta}\cdot \frac{1}{\cos\theta}=\sec^2\theta - \sec\theta \tan\theta

By definition, 1 / cos(θ) = sec(θ) and sin(θ)/cos(θ) = tan(θ). Hence:

\displaystyle \sec^2\theta - \sec\theta\tan\theta \stackrel{\checkmark}{=}  \sec^2\theta - \sec\theta\tan\theta

Hence verified.

8 0
2 years ago
The width of a rectangle is 5 more than twice the length. If the perimeter of the rectangle is 190 meters ,what is the width of
slega [8]
P=2(l+w)

190=2[(2l+5)+l)
190=4l+10+2l
190=6l+10
180=6l
l=30

190=2(30+w)
190=60+2w
130=2w
w=65

The width of the rectangle is 65.
6 0
3 years ago
For a while, I've been looking into the discovery of pi. For some I still do not quite grasp it. How was pi discovered and what
GarryVolchara [31]
I don't know how it was discovered, but i do know for a fact that it is 22 divided by 7
4 0
3 years ago
PLEASE PLEASE HELP! QUICKLY!
Oksanka [162]

Step-by-step explanation:

we have

m∠3 = 128°

m∠3 = m∠7---------------- > Corresponding Angles

180°=m∠7+m∠8---------- > Supplementary Angles

therefore

m∠8=180°-128°=52°

the answer is the m∠8 is 52°

5 0
3 years ago
Other questions:
  • How do you convert the equation to factored form
    11·2 answers
  • 2. Mr. Terrific Teacher recorded the scores of unit
    12·1 answer
  • Sara says that median does not have to be one of the numbers in a set.
    14·2 answers
  • Can anyone tutor me on linear equations?
    6·1 answer
  • On your family trip, you used 9 gallons of gas. If the odometer readings before and after your trip were 74,233 and 74,545, resp
    10·1 answer
  • Like a fish hop what is 89 x 3 - 5
    13·2 answers
  • Lisa solved the equation x + 6 = 8 + 7x and claimed that the solution is X=-6. Is she
    6·1 answer
  • I'm only good at answering not solving:,)
    12·2 answers
  • HELP PLEASE !!!!!!!!!!!!!!!
    13·1 answer
  • A gym teacher has a large canvas bag that contains 8 tennis balls, 2 volleyballs, 1 basketball, 3 baseballs, and 5 footballs. If
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!