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MAXImum [283]
3 years ago
7

In a class of 20 students, all but 4 of the students put their names on a typed assignment. If the teacher randomly guesses, wha

t is the probability that she correctly guesses which paper belongs to each of the four remaining students
Mathematics
1 answer:
Fiesta28 [93]3 years ago
6 0

Answer:

4.17%

(1/4)(1/3)(1/2)(1)

alternative you can say that there are 24 permutations of

4 items and that you have to guess 1 of them 1/24 = 4.17%

Step-by-step explanation:

0.25  

0.333333333  

0.5  

1  

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Andrew is painting a wall on the side of his house. He has a 20 foot ladder wich makes a 79 degree angle with the ground. Standi
torisob [31]

Andrew can reach a maximum of 24.6ft high up the wall.

The right-angled triangle formed can be solved using the sine ratio. that is

sin(72^\circ})=\dfrac{h}{20}

where h is the distance from the foot of the wall to the tip of the ladder where it rests on the wall. Substituting, and solving for h, we get

0.9816=\dfrac{h}{20}\\\\h=20\times0.9816\\\\h=19.632ft

Since Andrew can reach an extra 5ft above the point where the ladder rests against the wall, the maximum height Andrew can paint is

(19.632+5)ft=24.632ft\\\\\approx24.6ft

Another solved word problem on trigonometry can be found here: brainly.com/question/12146092

3 0
3 years ago
supposed the first friday of a new year is the fourth day of that year .will the year have 35 friday regardless of whether or no
inysia [295]
No there is 53 Friday's in a year
6 0
4 years ago
You are graphing Rectangle ABCDABCDA, B, C, D in the coordinate plane. The following are three of the vertices of the rectangle:
emmainna [20.7K]

Answer:

Rectangle ABCDABCDA, B, C, D is graphed in the coordinate plane. vertices of the rectangle: A(-1, -6),A(−1,−6),A, left parenthesis, minus, 1, comma, minus, 24+2 ps y+4 sr y+5 qR 2x + 3 pq 2y+2.

Step-by-step explanation:

8 0
3 years ago
Solve for x by factoring. Check your answers. Can you check to see if I'm correct?
Studentka2010 [4]
If you want to check if your answer is correct, expanding it all out will help!

(x-6)(x+2)=0 <-- Use FOIL tactic 

x²+2x-6x-12=0

x²-4x-12=0 

As you can see, this is identical to the initial equation given. The x values would be 6 and -2, as seen from the factored equation. 

Hope I helped :) 
7 0
3 years ago
The instructor thinks that the students may have answered the questions by guessing, so that the probability that any given answ
Lisa [10]

Answer:

hmmmm if theres choices its B

5 0
3 years ago
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