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3 years ago

13

The probability of choosing a green grape out of the bag that contains red and green grapes without looking is StartFraction 11

over 15 EndFraction. Which term best describes this probability?

2 answers:

Natasha2012 [34]3 years ago

7 0

Answer:

its likely

Step-by-step explanation:

it may be uncertian but there are possibilities

emmainna [20.7K]3 years ago

7 0

Answer:

its likely

Step-by-step explanation:

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A building 50ft tall is on top of a hill A surveyor is at a point on the hill and observes that the angle of elevation to the to

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the answer is the difference of 48-20

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3 years ago

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Which statements are true?

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A train travels 430 miles in 5 hours at a constant speed.

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2.5

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3 years ago

List any restrictions on the domain for the equation <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%2B9%7D%7Bx%2B2%7D%20" id="

frez [133]

For a fraction, if the denominator turns to 0, the fraction becomes undefined, and therefore, that's a restriction on a rational.

now, what values of "x" makes the denominator 0? let's check,

x+2 = 0

x = -2

so, if "x" ever becomes -2, then you'd get

$\bf \cfrac{x+9}{x+2}\implies \cfrac{x+9}{-2+2}\implies \implies \cfrac{-2+9}{-2+2}\implies \stackrel{und efined}{\cfrac{7}{0}}$

so, the domain, or values "x" can take on safely, are any real numbers EXCEPT -2.

7 0

3 years ago

Someone please solve and explain part a(i)

Crank

Step-by-step explanation:

the way I understand the description :

C is below B. they are on a kind of straight hill, and there is a straight "road" going up from C to B.

then, at B there is an antenna or other firm of mast going straight up.

therefore, this is not a right-angled triangle with 90 degrees at B (as it would be, if this would be in a flat plane).

but because it goes downhill from B to C the angle is 105 degree.

(a)(i)

now, imagine, there would be a horizontal plane either at B or at C. AB would have a true 90 degree angle with this plane. so, what is the angle of CB with this plane ?

this angle is the "excess" of the 90 degrees, as CB angles down from the horizontal plane at B, or angles up with the same angle from the horizontal plane at C.

what is the "excess" of 105 degrees vs. the standard 90 degrees ? 105 - 90 = 15 degrees.

(a)(ii)

the extended Pythagoras for not right-angled triangles :

c² = a² + b² - 2ab×cos(B)

B being the angle opposite of the Hypotenuse c.

so, we have

c² = 15² + 10² -2×15×10×cos(105) = 225 + 100 - 300×cos(105) =

= 325 - 300×cos(105) = 402.6457135...

c = 20.06603383... ≈ 20 m

4 0

3 years ago