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3 years ago

A bag contains 7 green balls and 3 white balls.

Mathematics

2 answers:

tia_tia [17]3 years ago

6 0

10 balls in total therefore

A) chance of being white is 3/10

Chance twice: 3/10

Both white = 3/10 x 3/10 = 9/100

B) 3/10 x 7/10 = 21/100

Orlov [11]3 years ago

3 0

10 total balls.

A) first pick white = 3/10

Second pick white = 3/10

Both white = 3/10 x 3/10 = 9/100

B) 3/10 x 7/10 = 21/100

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HELP FAST PLEASE!!!

Alisiya [41]

Answer:

$y = -0.75x + 9.5$

Step-by-step explanation:

Equation of a circle is given as :

$(x-a)^{2} + (y-b)^2 = r^{2} \\(x-6)^{2} + (y-5)^2 = 4^{2}\\x^{2} - 12x + 36 + y^{2} -10y + 25 = 16\\x^{2} - 12x + y^{2} -10y + 45 = 0\\$

Take the derivative of the above with respect to x

$2x - 12 + 2y dy/dx - 10 dy/dy = 0\\\frac{dx}{dy} = \frac{6 - x}{y-5} \\At (2,8) dy/dx = (6-2)/(8-5) = 4/3\\dy/dx = 4/3\\The slope of the tangent to the circle, m = \frac{-1}{dy/dx} \\m = \frac{-1}{4/3}\\m= -0.75$

The equation of the tangent is given by :

$y - y_{1} = m(x - x_{1})\\ y - 8 = -0.75(x - 2)\\y - 8 = -0.75x + 1.5\\y = -0.75x + 9.5$

8 0

3 years ago

Read 2 more answers

5n - 2 = 6r + 5<br> What is n

Zina [86]

It would like this for solving n

6 0

2 years ago

Simplify the expression the root of negative sixteen all over the quantity of three minus three i plus the quantity of one minus

aliya0001 [1]

The first step is to multiply the fraction by (3 +3i) / (3 +3i) to delete the i terms from the denominator:

$\frac{ \sqrt{-16} }{3-3i} . \frac{3+31}{3+3i} +1-2i= \frac{4i(3+3i)}{9+9} +1-2i= \frac{12i-12}{18} +1-2i=$

$\frac{12i-12+18-36i}{18} = \frac{6-24i}{18} = \frac{1}{3} - \frac{4}{3} i$

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3 years ago

What is the vertex of y=-6(2.5-x)(x-5.5)?

Alex787 [66]

Hello :

<span> y=-6(2.5-x)(x-5.5) = -6(2.5x -13.75 -x² +5.5x)
y = -6(-x²+8x -13.75)
y = 6x²-48x+82.5
note :
if f(x) = ax²+bx +c the vertex is the point : ( -b/2a ; f(-b/2a))
a=6 b=-48 c = 82.5 .......calculate
-b/2a = -(-48)/2(6)= 4
f(4) =6(4)²-48(4)+82.5 =96 - 192 +82.5 = -13.5</span>

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3 years ago

Jillian wants to find the surface area of a pyramid. the base is a square with sides that are 4 inches long the other faces are

Natali5045456 [20]

Part a:-
The base of each triangle is 4 inches long.
Their height is 3/2 * 4 = 6 inches.

b
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c
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7 0

2 years ago