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2 years ago

We toss three coins. What is the probability of the event "3 Heads appear"?

Mathematics

2 answers:

My name is Ann [436]2 years ago

7 0

1/8 why? because 1/2 for the first head. times 1/2 for the second head. times 1/2 for the third head

Anestetic [448]2 years ago

3 0

I think that there is 2% chance of it landing on heads.

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Simplify the following 4√28÷3√7

finlep [7]

Answer:

8/3 ( Fraction Form), 2.6 ( Decimal Form), 2 2/3 ( Mixed Number Form)

Step-by-step explanation:

Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.

6 0

2 years ago

Read 2 more answers

How can I solve this proof?? PLZ HELP I DONT UNDERSTAND!! Thanks !!

love history [14]

Hello from MrBillDoesMath!

Answer:

See below

Discussion:

Triangles BAD and BCD are congruent by the SAS postulate.

* Side AD = DC because BD is the perpendicular bisector of AC.

* Angle ADB and CDB are both right angles, and hence equal, because

BD is the perpendicular bisector of AC)

Corresponding parts of congruent triangles are equal so angle BAD = angle BCD, which was to be proven.

Regards,

MrB

8 0

3 years ago

What are the zeros of the quadratic function f(x) = 2x2 – 10x – 3?

Ipatiy [6.2K]

Answer:

$x = \frac{ 5 \ + \ \sqrt{31}}{2} \ , \ x = \frac{ 5 \ - \ \sqrt{31}}{2}$

Step-by-step explanation:

$2x^2 - 10x - 3 = 0 \\\\a = 2 \ , b = - 10 \ , \ c = - 3 \\\\x = \frac{-b^2\ \pm \ \sqrt{b^2 - 4ac}}{2a}\\\\x = \frac{10 \ \pm \sqrt{(-10)^2 - ( 4 \times 2 \times -3)} }{2 \times 2}\\\\x = \frac{10 \ \pm \sqrt{(100 - ( -24 )} }{4}\\\\x = \frac{10 \ \pm \sqrt{(100 + 24 } }{4}\\\\x = \frac{ 10 \ \pm \sqrt{124}}{4}\\\\x = \frac{ 10 \ \pm \sqrt{4 \times 31}}{4}\\\\x = \frac{ 10 \ \pm \sqrt{2^2 \times 31}}{4}\\\\x = \frac{ 10 \ \pm2 \sqrt{31}}{4}\\\\x = \frac{ 5 \ \pm\sqrt{31}}{2}\\\\$

$x = \frac{ 5 \ + \ \sqrt{31}}{2} \ , \ x = \frac{ 5 \ - \ \sqrt{31}}{2}$

3 0

2 years ago

Complete the equation of the lines whose slope is 5 and y-intercept is (0,4) y = ?

Dimas [21]

Answer:

y = 5x + 4

Step-by-step explanation:

y - 4 = 5(x - 0)

That is point-slope form. I'm not sure if you want it in slope intercept form, but slope intercept form of the equation is -

y = 5x + 4

7 0

3 years ago

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

Alisiya [41]

The answer is 2(–4y + 13) – 3y = –29

Step 1: Express x from the second equation
Step 2: Substitute x into the first equation:

The system of equations is:
2x – 3y = –29
x + 4y = 13

Step 1:
The second equation is: x + 4y = 13
Rearrange it to get x: x = - 4y + 13

Step 2:
The first equation is: 2x – 3y = –29
The second equation is: x = - 4y + 13
Substitute x from the second equation into the first one:
2(-4y + 13) - 3y = -29

Therefore, the second choice is correct.

5 0

3 years ago