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Triss [41]
3 years ago
10

A marble is drawn at random first from a jar containing four black and four white marbles, and then from a jar containing six bl

ack and two white marbles. What is the probability of drawing two black marbles?
Mathematics
2 answers:
castortr0y [4]3 years ago
3 0

|\Omega|=8\cdot8=64\\ |A|=4\cdot6=24\\\\ P(A)=\dfrac{24}{64}=\dfrac{3}{8}=37.5\%

krok68 [10]3 years ago
3 0

Answer:

the answer is 37.5% Hope this helps!

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8+11=96 guys it goes
Veseljchak [2.6K]
1+4 = 5
2+5 and add 5 = 12
3+6 and add 12 = 21
4+7+21=32
5+8+32=45
6+9+45=60
7+10+60=77
8+11+77=96
7 0
3 years ago
the hypotenuse of a 45-45-90 triangle has a length of 10 units. what is the length of one of its legs?
SIZIF [17.4K]
When a triangle is a 45-45-90 triangle, the following rules apply:

-the 2 legs are equal lengths
- the length of the hypotenuse is: the square root of 2 x the length of a leg.
- the length of the leg is: hypotenuse divided by the square root of 2.

if the hypotenuse is 10, then 10 divided by the square root of 2 is how you find the leg.
the square root of 2 is <span>1.41421356237. 
10 divided by </span>1.41421356237 is <span>7.07106781188, which can be rounded to about 7.1. The length of one leg is about 7.1 units!</span>
6 0
3 years ago
A store marks up merchandise 40% for profit. If the store purchases the item for $12, what is the selling price?
gregori [183]

Answer:

b

Step-by-step explanation:

i dont really know how to explain my proccess clearly to you, but i got it right on one of my quizes

3 0
3 years ago
Read 2 more answers
Whats wrong with my answers?
malfutka [58]

77a)

y=0.5x-2\implies y=\cfrac{x}{2}-2\implies \stackrel{x-intercept}{0=\cfrac{x}{2}-2} \\\\\\ 2=\cfrac{x}{2}\implies 4=x\qquad \qquad \boxed{(4~~,~~0)} \\\\\\ \stackrel{y-intercept}{y=0.5(0)-2}\implies y=-2\qquad \qquad \boxed{(0~~,~~-2)}

77b)

y=-0.4x+2\implies y=-\cfrac{4x}{10}+2\implies y=\cfrac{2x}{5}+2 \implies \stackrel{x-intercept}{0=\cfrac{2x}{5}+2} \\\\\\ -2=\cfrac{2x}{5}\implies -10=2x\implies \cfrac{-10}{2}=x\implies -5=x~\hfill \boxed{(-5~~,~~0)} \\\\\\ \stackrel{y-intercept}{y=-0.4(0)+2}\implies y=2\qquad \qquad \boxed{(0~~,~~2)}

8 0
2 years ago
Help Math with please
Ber [7]

Answer:

the correct answer is 8,000ft

Step-by-step explanation:

sin30°=4000ft/h

hsin30°=4000ft

h=4000ft/sin30°

h= 8,000ft

5 0
3 years ago
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