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madam [21]
3 years ago
13

The sum of the first natural number and 0 is 1, the sum of the first two natural numbers and 0 is 3, the sum of the first three

natural numbers and 0 is 6, and the sum of the first four natural numbers and 0 is 10. Which explicit formula generates the sum of the first n natural numbers and 0?
Mathematics
2 answers:
Kitty [74]3 years ago
8 0
The sum of the first n natural numbers and 0=
n*(n+1)/2
lesantik [10]3 years ago
3 0

Answer:

A

Step-by-step explanation:

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Shkiper50 [21]

Answer:

-0.00516129032

Step-by-step explanation:

(4 - 1 - 5 - 1) - 1/(52 × 3 × 5 - 5)

-4/775

-0.005

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What is the length of the hypotenuse of the triangle?
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Answer:

StartRoot 58 EndRoot cm

THE ANSWER IS D

Step-by-step explanation:

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8 0
2 years ago
Water level in a well was 20m below ground level. During rainy season, rainwater collected in different water tanks was drained
IgorC [24]

Answer:

17 m

Step-by-step explanation:

As shown in the figure,  A_0-B_0 is the ground level, A_1-B_1 is the old level of water which was at 20 m below ground level, A_2-B_2 is the new level of water which is 5m above of old level. The height of wall of the well, 1.20 m, and the the pelly at 80 cm =0.80 m, has been shown too.

The minimum length of the rope is equal to the distance between the pully and the new water level, indicated by the length L_0 in the figure.

So, L_0= 20-5+1.20+0.80= 17m

Hence, Raghu must use a rope having the minimum length 17 m to draw water from the well.

6 0
3 years ago
Carlos has a fair die and a number cube. He will flip the fair die one time and roll the number cube one time. What is the proba
saul85 [17]

Answer: 0.42 and 5 outcomes.

Step-by-step explanation:

i guess that carlos has a fair coin and a number cube.

the probability can be calculated as the number of outcomes that we want divided the total number of outcomes.

The coin has two possible outcomes, heads and tails, then the probability of getting heads is p1 =1/2

the number cube has 6 numbers, 5 of those 6 numbers are greater than 1, then the probability of getting a number greater than 1 is p2 =5/6

the joint probability is the product of those two:

P = 1/2*5/6 = 5/12 = 0.42

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Heads and 2

Heads and 3

Heads and 4

Heads and 5

Heads and 6.

5 0
3 years ago
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