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WINSTONCH [101]
3 years ago
13

Jennifer has watched 42 minutes of a movie, which is 20% of the movie. What is the total length in minutes of the movie?

Mathematics
2 answers:
Romashka-Z-Leto [24]3 years ago
6 0

Answer:

210

Step-by-step explanation:

20% is equal to 1/5

5*42 = 210

The movie is 210 minutes.

tamaranim1 [39]3 years ago
3 0

Answer: 210

5 x 42 =                        210

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A. 4.25p + 3.79c

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Solve the system of equations.<br> 57 - 10x = 45<br> -<br> - 3y + 10x = -5
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Answer: Step-by-step explanation:

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Each supply bin has 4 bottles of glue and 3 pairs of scissors. What is the ratio of total supplies to bottles of glue?
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7 : 4

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A coin is tossed 4 times. Let E1 be the event "the first toss shows heads" and E2 the event "the second toss shows heads" and so
Elden [556K]

Answer:

The events are independent.

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Step-by-step explanation:

The sample space for this experiment consists of 2⁴= 16 sample points, as each toss can result in two outcomes we assume that the events are equally likely.

Two events are independent in the sample space if the probability of one event occurs, is not affected by whether the other event has or has not occurred.

In general the k events are defined to be mutually independent if and only if the probability of the intersection of  any 2,3,--------, k  equals the product of their respective probabilities.

P (A∩B) = P(A). P(B)

P (A∩B)   = 1/2. 1/2= 1/4

                                                                  Head          Tail

 P(E1)= 1/2  ----------          Coin 1               H,H              T,H

                                                                1/4                  1/4

  P(E2)= 1/2  ---------------  Coin 2             H, H               H,T

                                                                      1/4           1/4

So the events are independent.

The probability of showing heads on both toss is equal to 1/2

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Or in other words ( 1/4* 1/4) = 2/4 = 1/2

4 0
2 years ago
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