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Sedaia [141]
3 years ago
8

A classroom has 12 students with brown hair, 8 students with black hair, and 5 students with blonde hair. If three students are

chosen at random, what is the probability that they all have black hair?
a. 1/160

b. 3/575

c.14/575

d. 336/15625
Mathematics
1 answer:
aksik [14]3 years ago
4 0
I am going to have to go with, C, because the other answers are Invalid.
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My father's car travel on average 33.4miles on each gallon of petrol. How far will he travel on 55 gallons.
DIA [1.3K]

YOUR FATHER CAN TRAVEL 1837.0 MILES ON 55 GALLONS OF PETROL.  

BRAINLIST PLEASE

6 0
2 years ago
Twice the difference between a number
Alecsey [184]

Answer:

Let x = the number

2(x-5) = 9

2x - 10 = 9

2x = 19

x = 9.5

Step-by-step explanation:

7 0
2 years ago
​ Quadrilateral ABCD ​ is inscribed in this circle.
Anna [14]
A quadrilateral, has 4 sides and its internal angles sum, add up to 360, now... you have 3 angles give.. .but we don't have C

so.. C is the difference of all the three angles from 360 or  \bf \measuredangle C=360-x-(2x+1)-148\implies \measuredangle C=360-x-2x-1-148   whatever that is, now, you'll get some value in x-terms

so.... now once we know what C is

you can if you want, do a search in google for "inscribed quadrilateral conjecture",  I can do a quick proof if you need one

but in short, for a quadrilateral inscribed in a circle, each pair of opposites angles are "supplementary angles", namely they add up to 180°

so.. what the dickens does all that mean?   well D+B=180 and A+C = 180

now. we know what A is, 2x+1
and by now, you'd know what C is from  360-x-2x-1-148

so... add them together then   and

\bf \begin{array}{cccclllll}
A&+&C&=&180\\
\uparrow &&\uparrow \\
(2x+1)&+&(360-x-2x-1-148)&=&180
\end{array}

solve for "x"


6 0
3 years ago
Read 2 more answers
Suppose Wesley is a marine biologist who is interested in the relationship between the age and the size of male Dungeness crabs.
Eva8 [605]

Answer:

20.24 cm

Step-by-step explanation:

Here, since the age of the crab is given in months and the regression line was computed using the age in months, we just have to replace the value of the age in the formula to estimate the size.

The formula obtained for the estimated size Y was

Y = 9.1411 + 0.4775X  

where X is the age in months

Replacing X with 23.2417, we get

Y = 9.1411 + 0.4775*23.2417 = 20.24 cm

7 0
3 years ago
Domain and range and function or not<br><br>​
aksik [14]

Answer:

Domain: -2,0,1,3,4

Range: 2,3

Yes its a function

Step-by-step explanation:

4 0
3 years ago
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