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mr Goodwill [35]

1 year ago

6

With the metal detector we find 70 Roman coins underground,30 are Etruscan,15 are Greek. What is the probability ,that I draw

a Greek coin?

2 answers:

FromTheMoon [43]1 year ago

6 0

Answer:

30*100/70= 42.85% chances that you will draw a Etruscan coin and same way 42.85-100= 57%

Serhud [2]1 year ago

5 0

Answer:

<u>3/23</u>

Step-by-step explanation:

Probability (Greek) :

Number of Greek coins / Total coins
15 / 70 + 30 + 15
15/115
<u>3/23</u>

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mr Goodwill [35]

I am pretty sure its JT

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2 years ago

Given: ABCD is a parallelogram and AC bisects BD.<br> Prove: AB is congruent to BC.

earnstyle [38]

Let's see

In ∆ABE and ∆CBE

BE=BE(Common side)
AE=EC[Diagonals of a parallelogram bisect each other]
<AEB=<BEC[90°]

So by

SAS congruence the triangles are congruent

AB=BC

Proved

Fact:-

It's already given AC is perpendicular to BD

It means diagonals are perpendicular to each other

According to general property of rhombus this parallelogram is also a rhombus.

So sides are equal hence AB =BC

3 0

1 year ago

Hi, can someone please help, and possibly explain the answer please.

mr_godi [17]

Answer:

$x=\frac{-(-2)\±\sqrt{(-2)^2-4(3)(0)} }{2(3)}$

Step-by-step explanation:

Quadratic formula: $x=\frac{-b\±\sqrt{b^2-4ac} }{2a}$ when the equation is $0=ax^2+bx+c$

The given equation is $1=-2x+3x^2+1$ . Let's first arrange this so its format looks like $y=ax^2+bx+c$ :

$1=-2x+3x^2+1$

$1=3x^2-2x+1$

Subtract 1 from both sides of the equation

$1-1=3x^2-2x+1-1\\0=3x^2-2x+0$

Now, we can easily identify 3 as a, -2 as b and 0 as c. Plug these into the quadratic formula:

$x=\frac{-b\±\sqrt{b^2-4ac} }{2a}\\x=\frac{-(-2)\±\sqrt{(-2)^2-4(3)(0)} }{2(3)}$

I hope this helps!

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2 years ago

Alla [95]

Each result is equally likely to occur!!

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Lady_Fox [76]

Answer:

D

Step-by-step explanation:

Growth rate is exponential, and rate is 100%

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2 years ago

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