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
UkoKoshka [18]
2 years ago
7

This week in school, there is a 75 percent probability of having a fire drill, a 50 percent probability of a tornado drill, and

a 25 percent probability of having both drills. Let event F be a fire drill and event T be a tornado drill. Are the two events independent?
Mathematics
2 answers:
Sphinxa [80]2 years ago
7 0
For E2020 users, the correct answer is A (No,<span>because </span>P<span>(F ∩ T) ≠ </span>P<span>(F) • </span>P<span>(T).)</span>
ArbitrLikvidat [17]2 years ago
7 0

Answer with Step-by-step explanation:

The events A and B are called independent if:

P(A∩B)=P(A)×P(B)

We are given that:

This week in school, there is a 75 percent probability of having a fire drill,

a 50 percent probability of a tornado drill,

and a 25 percent probability of having both drills.

Let event F be a fire drill and event T be a tornado drill.

P(F)=0.75

P(T)=0.50

P(F∩T)=0.25

P(F)×P(T)=0.375≠P(F∩T)

Hence, events F and T are not independent

You might be interested in
Given the equations f(x) = x + 4 and d (x) = 2x + 5, find: f (1) + d (2)
Lina20 [59]
1 = x + 4
3 = x

2 = 2x + 5
3 = 2x
3/2= x
3 0
3 years ago
One number is 2 less than a second number. Twice the second number is 5 less than 3 times the first. Find the two numbers.
Evgen [1.6K]

Answer:

9 and 11  

Step-by-step explanation:

First number = x -2

Second number = x

  and   2x = 3(x-2)  - 5

            2x = 3x - 6 - 5

             x = 11

              first number = 11-2 = 9

8 0
2 years ago
Determine whether the quadrilateral is a parallelogram. Justify you answer.
agasfer [191]

Answer:

It is a quadrilateral.

Step-by-step explanation:

Quadrilateral is a 4-sided shape where the total angles is 360°.

So when you add up all the angles, you will get 360°.

4 0
2 years ago
13+(-19)=<br> Integer's<br> Best one is mark as brainlist
ANEK [815]

Answer:

-6

Step-by-step explanation:

13+(-19)  (distribute "+" sign into parentheses)

= 13-19

= -6

5 0
3 years ago
Write 3x^2-18x-6 in vertex form
Vedmedyk [2.9K]
The standard form of a quadratic equation is \displaystyle{ y=ax^2+bx+c, while the vertex form is:

                      y=a(x-h)^2+k, where (h, k) is the vertex of the parabola.

What we want is to write \displaystyle{ y=3x^2-18x-6 as y=a(x-h)^2+k

First, we note that all the three terms have a factor of 3, so we factorize it and write:

\displaystyle{ y=3(x^2-6x-2).


Second, we notice that x^2-6x are the terms produced by (x-3)^2=x^2-6x+9, without the 9. So we can write:

x^2-6x=(x-3)^2-9, and substituting in \displaystyle{ y=3(x^2-6x-2) we have:

\displaystyle{ y=3(x^2-6x-2)=3[(x-3)^2-9-2]=3[(x-3)^2-11].

Finally, distributing 3 over the two terms in the brackets we have:

y=3[x-3]^2-33.


Answer: y=3(x-3)^2-33
6 0
3 years ago
Other questions:
  • In 2006, Dunkin donuts company had 300,000 is donut sales. In 2007, sales were up 40%. What are Dunkin Donuts sales for 2007?
    8·1 answer
  • What is 2/5+5/3+9/3=
    15·1 answer
  • What’s 5,068 rounded to the nearest ten
    8·2 answers
  • My ice chest is at -79 degrees Celsius. What would it convert into Fahrenheit
    7·1 answer
  • Which graph represents an exponential function?i
    6·1 answer
  • A company is billed $1,850 with a cash discount of 5% offered for payment within ten days. How much could it save?​
    15·2 answers
  • Bobby set a goal to earn $1,500 in commission in June. He earns 10% commission for all of his sales. How much merchandise will h
    10·1 answer
  • HELP PLEASE WILL MARK BRAINLEST
    13·1 answer
  • What is 6 ( 8 + w). Use the distributive property to remove the parentheses.
    10·2 answers
  • John is making a square flag. He wants the perimeter to be at least 24 inches. Find the possible side lengths.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!