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
Rasek [7]
3 years ago
5

The experimental probability of a coin landing on heads is 7/12. If the coin landed on tails 30 times, find the number of tosses

Mathematics
1 answer:
nordsb [41]3 years ago
4 0
Answer: 72 tosses

Explanation: If the probability of landing heads is 7/12, the probability of landing tails is 5/12. So then you do cross multiplication, where you multiply the 12 and the 30, equalling 360. Then divide that by 5, equalling 72.
You might be interested in
Someone please double check my answers for this project
hammer [34]

Answer:

yes you got right

Step-by-step explanation:

because you did do it step by step

8 0
2 years ago
Verify that y1(t) = 1 and y2(t) = t ^1/2 are solutions of the differential equation:
Papessa [141]

Answer: it is verified that:

* y1 and y2 are solutions to the differential equation,

* c1 + c2t^(1/2) is not a solution.

Step-by-step explanation:

Given the differential equation

yy'' + (y')² = 0

To verify that y1 solutions to the DE, differentiate y1 twice and substitute the values of y1'' for y'', y1' for y', and y1 for y into the DE. If it is equal to 0, then it is a solution. Do this for y2 as well.

Now,

y1 = 1

y1' = 0

y'' = 0

So,

y1y1'' + (y1')² = (1)(0) + (0)² = 0

Hence, y1 is a solution.

y2 = t^(1/2)

y2' = (1/2)t^(-1/2)

y2'' = (-1/4)t^(-3/2)

So,

y2y2'' + (y2')² = t^(1/2)×(-1/4)t^(-3/2) + [(1/2)t^(-1/2)]² = (-1/4)t^(-1) + (1/4)t^(-1) = 0

Hence, y2 is a solution.

Now, for some nonzero constants, c1 and c2, suppose c1 + c2t^(1/2) is a solution, then y = c1 + c2t^(1/2) satisfies the differential equation.

Let us differentiate this twice, and verify if it satisfies the differential equation.

y = c1 + c2t^(1/2)

y' = (1/2)c2t^(-1/2)

y'' = (-1/4)c2t(-3/2)

yy'' + (y')² = [c1 + c2t^(1/2)][(-1/4)c2t(-3/2)] + [(1/2)c2t^(-1/2)]²

= (-1/4)c1c2t(-3/2) + (-1/4)(c2)²t(-3/2) + (1/4)(c2)²t^(-1)

= (-1/4)c1c2t(-3/2)

≠ 0

This clearly doesn't satisfy the differential equation, hence, it is not a solution.

6 0
3 years ago
I don’t need you to explain just answer.
Mama L [17]

Answer:

-4 <x< -2

Step-by-step explanation:

you need to plot the line between -4 and -2

5 0
3 years ago
I NEED HELP.<br> 2X^2-8X= BUT FACTORISE!
shutvik [7]

Answer:

This is my answer

2x(x-4)

Step-by-step explanation:

2x(x-4)

3 0
3 years ago
Read 2 more answers
How can you revise a rough draft to create a clearer focus in the personal narrative? Choose the correct answer.
Citrus2011 [14]

Answer:

remove any unnecessary information

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • In your notebook, draw several perpendicular lines. what kind of angles are formed? acute angles obtuse angles right angles
    15·2 answers
  • The perimeter of a rectangle is 54 cm. The area of the same rectangle is 176 cm². What are the dimensions of the rectangle? . 11
    9·2 answers
  • Anyone mind helping me out:/
    9·1 answer
  • How do you divide this? I don't get it. Like, I know HOW to divide decimals, but this is confusing me.​
    7·1 answer
  • Verify the pythagorean identity 1 + c o t ^2 θ = c s c ^2 θ
    14·1 answer
  • HELP PLZ ALMOST DONE!!!
    15·2 answers
  • Simplify the expression .
    11·1 answer
  • Find the value of x in the rectangle below.​
    11·1 answer
  • I need to know this now please
    9·1 answer
  • Use the distributive property to remove the parentheses. (-2+2w+4w)(-7)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!