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3 years ago

6

Problem The sum of 5 consecutive even numbers is 310 What is the third number in this sequence?

2 answers:

My name is Ann [436]3 years ago

8 0

Choose x to represent the 1st number in the sequence.
The 2nd is x+2.
The 3rd is x+4
The 4th is x+6, and
The 5th is x+8

The sum of these 5 numbers is 5x + 2 + 4 + 6 + 8 = 310

Thus, 5x = 310 - (2+4+6+8) or 5x = 310 - 20. 5x = 290

Then x comes out to be 58.

the 2nd number is 58+2 = 60.

The 3rd number is 60 + 2 = 62. This is the answer.

Goshia [24]3 years ago

4 0

The third number in this sequence that adds to 3120 is 62

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you have a bag full of 17 marbles. Of those marbles, 3 are black. What is the probability that a marble chosen is not black

sdas [7]

Total number of marbles = 17

3 are black.

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= 14 / 17

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3 years ago

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Korvikt [17]

Answer:

2 to the power 1/6.

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2 years ago

Read 2 more answers

Newton's Law of Gravitation can be used to show that if an object weighs w pounds on the surface of the earth, then its weight a

Agata [3.3K]

Answer:

W'(x) = $\frac{-240R^2}{h^3}$

Here, the negative sign depicts the loss in weight

Step-by-step explanation:

Data provided in the question :

Function:

W(x) = $\frac{wR^2}{x^2}$

Here,

R = 3,960 miles is the radius of the earth

w = Weight of the pilot = 120 lb

x is the distance from the center of the earth

Therefore,

Rate of change of weight

W'(x) = $\frac{d(\frac{wR^2}{x^2})}{dx}$

or

W'(x) = $\frac{(-2)wR^2}{x^3}$

on substituting the respective values, we get

W'(x) = $\frac{(-2)(120)R^2}{(h)^3}$

or

W'(x) = $\frac{-240R^2}{h^3}$

Here, the negative sign depicts the loss in weight

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3 years ago