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3 months ago

11

George put some cards into a basket. Then he drew 3 cards out of the basket. Is this a random sample of cards in the basket? Why

or why not ?

1 answer:

babunello [11.8K]3 months ago

7 0

Answer:

Ini karena dia tidak tahu dengan pasti kartu apa yang ada di dalam keranjang dan dia juga tidak tahu ketiga kartu yang akan ia ambil.

Step-by-step explanation:

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The steps to derive the quadratic formula are shown below: Step 1 ax2 + bx + c = 0 Step 2 ax2 + bx = − c Step 3 x2 + b over a ti

PIT_PIT [12445]

Answer:

$x + \frac{b}{2a} = \frac{+/ - \sqrt{b^2-4ac} }{2a}$

Step-by-step explanation:

Step 1:

$ax^2+bx+c = 0$

Step 2:

$ax^2+bx = -c$

Step 3:

$\frac{ax^2+bx}{a} = \frac{-c}{a}$

Step 4:

To complete the square, add $\frac{b^2}{4a^2}$ to both sides.

$x^2 + \frac{bx}{a} + \frac{b^2}{4a^2} = \frac{-c}{a} + \frac{b^2}{4a^2}$

Step 5:

$x^2 + \frac{bx}{a} + \frac{b^2}{4a^2} = \frac{-4ac+b^2}{4a^2}$

Step 6:

Taking square roots on both sides.

$x + \frac{b}{2a} = \frac{+/ - \sqrt{b^2-4ac} }{2a}$

3 0

3 months ago

You and your friends Jose and Sarah all live on the same street. You know that Jose lives five blocks from away from you. Jose s

Svet_ta [12734]

Answer:

Please refer to the explanation

Step-by-step explanation:

Given that:

Sarah, Jose, and you all reside on the same street:

The distance between you and Jose is 5 blocks

The distance between Jose and Sarah is 2 blocks

Calculating the distance (b) between you and Sarah:

Since it is not specified if Sarah is closer to you or to Jose;

Thus;

Distance b from you to Sarah will be:

(The distance to Jose ± the distance to Sarah)

b = (5 ± 2)

b = (5 + 2) or (5 - 2)

b = 7 blocks or 3 blocks

4 0

1 month ago