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Maslowich
3 years ago
12

Emily has 2 coins. If Emily flips both the coins at once, how many possible outcomes are in the sample space?

Mathematics
1 answer:
liberstina [14]3 years ago
6 0

Answer:

I think it's 4 and why do I have to write 20 letters?

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Step-by-step explanation:

A liter of milk cost $.75

A loaf of bread cost $1.75

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3 years ago
It is known that the straight line l is tangent to the circle x^2+y^2=4 at a point on the x-axis, and intersects with the straig
Talja [164]

Step-by-step explanation:

The general equation of a circle is

                                         (x \ - \ h)^2 \ + \ (y \ - \ k)^2 \ = \ r^{2},

where <em>h</em> and <em>k</em> forms the coordinates of the centre of the circle.

When the circle has a centre at the origin, the equation reduces into

                        .                            x^2 \ + \ y^2 \ = r^2.

Now, we are interested in solving for the <em>x</em>-intercepts (the <em>x</em>-coordinates when the circle intersects the <em>x</em>-axis), of the circle

                                                      x^2 \ + \ y^2 \ = \ 4 .

Thus,

                                                     x^2 \ + \ (0)^2 \ = \ 4 \\ \\ \\ \-\hspace{1.3cm} x^{2} \ = \ 4 \\ \\ \\ \-\hspace{1.4cm} x \ = \ \pm \ 2.

Geometrically speaking, the tangent to the circle at the point defined by one of the <em>x</em>-intercepts of the circle is actually a vertical line, more specifically the lines x \ = \ \pm \ 2.

First and foremost, for the vertical line x \ = \ 2, it intersects the straight line y \ = \ \displaystyle\frac{1}{2}x  , giving the y-coordinate for point P,

                                                    y \ = \ \displaystyle\frac{1}{2}(2) \\ \\ \\ y \ = \ 1.

Hence, the coordinates of point P are (1, \ 1).

However, since there are no boundaries given in the question and a circle is symmetrical about its centre, thus, point P also exists when the vertical line x \ = \ -2 and interdects the straight line y \ = \ \displaystyle\frac{1}{2}x.

                                                      y \ = \ \displaystyle\frac{1}{2}(-2) \\ \\ \\ y \ = \ -1.

Therefore, the coordinates of point P are also (1, \ -1).

8 0
2 years ago
New repost of my question
JulijaS [17]

Answer:

Step-by-step explanation:

???

4 0
2 years ago
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