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dmitriy555 [2]
3 years ago
11

Assume that when adults with smart phones are randomly selected 45% use them in meetings or classes if 30 adult smart phone user

s are randomly selected find the probability that exactly 20 of them use their smart phones in meetings or classes
Mathematics
1 answer:
lozanna [386]3 years ago
5 0

Answer:

2/3

Step-by-step explanation:

I think it is 2/3 because 20 is the probability and 30 are the users. So basically, it is the probability over the total in this case 30. 20/30=2/3. Hope it helps?

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The preimage and image of △DEF are shown
aleksley [76]

Answer:

x+3, y-4

Step-by-step explanation:

You are moving the triangle 3 to the right, so x+3, an 4 down, so y-4.

3 0
3 years ago
Is the point (-1,5) a solution to the equation y=2x-4?
lyudmila [28]
No because if you plug in -1 for x and 5 for y 5 doesn’t equal -6. You just plug in the point as x and y and if the equation is true then the point is a solution.
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4 years ago
2/3 of a pizza was left over. A group of friends divided the leftover pizza into pieces each
e-lub [12.9K]

Answer:

We can't directly answer it without the number of friends, so it would need to be a variable.

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3 years ago
A 16-foot ladder is leaning against a building at a 71 degree angle to the ground.
Llana [10]

Answer:

The answer to your question is the letter D.

Step-by-step explanation:

Data

length = 16 ft

angle = 71°

Opposite side = ?

Process

1.- To answer this question use trigonometric functions.

The trigonometric function that relates the Opposite side and the hypotenuse is sine.

2.- Write the trigonometric function

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3.- Substitution and result

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5 0
3 years ago
Read 2 more answers
Help<br><br> Please<br> See the picture
earnstyle [38]

Answer:

\frac{4}{3}\sqrt{3}

Step-by-step explanation:

the ratio of sides of a 30-60-90° triangle, respectively, are 1 : \sqrt{3} : 2

we can solve for 'x' using this proportion:

x/4 = 1/\sqrt{3}

now cross-multiply:

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