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lianna [129]
3 years ago
11

If 5 times a number increased by 4, the result is at least 19. Find at least possible number that satisfies these conditions

Mathematics
2 answers:
Ket [755]3 years ago
6 0

Answer:

X=3

Step-by-step explanation:

To the question

Let the number be x

And being 5 times of the number is 5x

And been increased by 4

(5x+4)=19

5x+4=19

Substrate 4 from both sides

5x=15

Divide both sides by 5

X=3

11Alexandr11 [23.1K]3 years ago
3 0

Answer:

The number is 3

Step-by-step explanation:

First we want to make an equation, 5 times n (a number) plus 4 = 19 (by using 19 the least possible awnser we know that it will be the least possible number that satisfied the requirements, if it didn't work we could have gone up one number until we found something that worked)

5n +4 =19     subtract 4 from both sides so that the 5n is alone

5n = 15      now divide by 5 so that the n is all alone

n=3

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A) 1/2197

B) 1/5525

Step-by-step explanation:

Probability is the likelihood or chance that an event will occur.

Probability = Expected outcome/Total outcome.

Since there are 52 random cards in a deck of card, the total outcome will be 52.

a) Also in a deck of card, there are 4 aces. If we are to select 3 aces with replacement, this means that each time we pick up an ace from the card, it was returned.

Pr(drawing an ace) = 4/52

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Pr(drawing 3 aces and replacing it) = 64/140,608

Pr(drawing 3 aces and replacing it) = 1/2197

b) If we pick 3 aces without replacement then each time we pick an ace, the total number cards keeps reducing.

Pr(picking the first ace) = 4/52

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Pr(picking the third ace without replacing) = 2/50 (since we didn't replace the first two aces, the total ace in the deck of card will reduce to 2 and the total will be 50)

Pr(drawing 3 aces without replacement) =  4/52*3/51*2/50

Pr(drawing 3 aces without replacement) =  24/132,600

Pr(drawing 3 aces without replacement) = 1/5525

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