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Andrew [12]
3 years ago
14

Two marbles are randomly drawn from a bag containing 3 purple, 1 blue, and 1 yellow marble. The first marble is blue and is not

replaced. Find the probability of drawing a second marble that is purple.
Mathematics
1 answer:
liq [111]3 years ago
4 0
I would say its 3/4 because there was only one blue and all together there is 4 now and the probability of picking a purple should be 3 out of 4.
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Cut a piece of 4 3/4 inches wood how much is left if board cutting from is 8 inches long
Aliun [14]
8-4=4

4-(3/4)= 3.25 or 3 1/4
8 0
3 years ago
Let P be the parabola with focus (0,4) and directrix y=x.Write an equation whose graph is a parabola with a vertical directrix t
prisoha [69]

Answer:

y²=4√2.x

Step-by-step explanation:

The focus is at (0,4) and directrix is y=x or x-y =0, for a parabola P.

The distance between the focus and the directrix of the parabola P is

\frac{ |0-4| }{\sqrt{(1)^{2}+(-1)^{2}  } }=\frac{4}{\sqrt{2} }

{Since the perpendicular distance of a point (x1, y1) from the straight line ax+by+c =0 is given by \frac{ |ax1+by1+c| }{\sqrt{a^{2}+b^{2}  } } }

Let us assume that the equation of the parabola which is congruent with parabola P is y²=4ax

{Since the parabola has vertical directrix}

Hence, the distance between focus and the directrix is 2a = \frac{4}{\sqrt{2} }, {Two parabolas are congruent when the distances between their focus and the directrix are same}

⇒ a=√2

Therefore, the equation of the parabola is y²=4√2.x (Answer)

3 0
3 years ago
Solve for a: a/2 - 2/3 = a + 1/5
ki77a [65]
The answer is 4 if I am correct
3 0
3 years ago
Read 2 more answers
What is the volume of the given shape? Leave answer in terms of π.
kodGreya [7K]

Volume of a cone = (PI * radius^2 * height) / 3

Volume of a cone = (PI * 3^2 * 8) / 3

Volume of a cone = (PI * 24)

Cylinder Volume = PI • r² • height

Cylinder Volume = PI * 3^3 * 12

Cylinder Volume = PI * 108

TOTAL Volume = PI * 132



8 0
3 years ago
6.91 as a mixed number and improper fraction?
il63 [147K]
691/100 and 6 whole, 91/100 :)
8 0
3 years ago
Read 2 more answers
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